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Part I Basic Equations and Oscillators |
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3 | (74) |
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1.1 Strings, Membranes, Bars, Plates, and Shells |
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3 | (29) |
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3 | (2) |
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1.1.2 Membranes and Strings |
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5 | (4) |
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9 | (3) |
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1.1.4 Constitutive Equations of Materials: Linear Elasticity |
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12 | (4) |
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16 | (10) |
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26 | (6) |
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32 | (9) |
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1.2.1 State Equation of a Gas |
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33 | (1) |
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1.2.2 Momentum Conservation |
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34 | (3) |
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1.2.3 Conservation of Mass |
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37 | (1) |
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1.2.4 Acoustic Wave Equation |
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37 | (1) |
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1.2.5 Simple Solutions: Traveling and Standing Waves |
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38 | (3) |
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1.3 Energy, Intensity, and Power |
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41 | (4) |
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1.3.1 Example of the Vibrating String |
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41 | (2) |
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1.3.2 Example of Linear Acoustic Waves |
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43 | (1) |
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1.3.3 Power and Impedance |
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43 | (2) |
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1.4 Sources in Musical Acoustics: Excitation Mechanisms |
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45 | (15) |
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1.4.1 Generalities About Sources and Types of Oscillations |
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46 | (1) |
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47 | (3) |
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1.4.3 Transient Mechanical Excitation |
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50 | (10) |
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1.5 Lumped Elements; Helmholtz Resonator |
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60 | (3) |
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1.6 Vibrating Strings-Sound Pipes Analogies |
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63 | (4) |
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1.6.1 Note on the Definition of Impedances for Forced Oscillations |
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66 | (1) |
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67 | (10) |
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1.7.1 Finite Difference Methods |
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67 | (3) |
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1.7.2 Finite Element Method |
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70 | (3) |
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73 | (4) |
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2 Single-Degree-of-Freedom Oscillator |
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77 | (24) |
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77 | (2) |
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2.2 Solution With and Without a Source: Green's Function |
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79 | (5) |
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2.2.1 Solution Without a Source; Eigenfrequency |
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79 | (2) |
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2.2.2 Solution with an Elementary Source: Green's Function |
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81 | (1) |
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2.2.3 General Solution with a Source Term |
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82 | (2) |
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2.3 Examples of Free and Forced Oscillations |
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84 | (3) |
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2.3.1 Displacement of a System from Equilibrium |
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84 | (1) |
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2.3.2 Excitation (Forced) by a Steady Sinusoidal Force |
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84 | (1) |
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2.3.3 Excitation by a Sinusoidal Force Starting at t = 0 |
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85 | (1) |
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2.3.4 Excitation by a Sinusoidal Force Stopping at t = 0 |
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86 | (1) |
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2.4 Forced Oscillations: Frequency Response |
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87 | (5) |
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2.4.1 Remarks on the Determination of the Resonance Frequency |
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90 | (2) |
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2.5 Energy, Power, and Efficiency |
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92 | (9) |
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92 | (3) |
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2.5.2 Mechanical Air Loaded Oscillator |
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95 | (6) |
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101 | (72) |
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101 | (2) |
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3.2 Time Scale: Transition from Wave to Mode |
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103 | (1) |
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3.3 Definitions and Basic Properties of the Eigenmodes |
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104 | (5) |
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104 | (4) |
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3.3.2 Extension to Continuous Systems |
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108 | (1) |
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3.4 Application to Vibrating Strings |
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109 | (34) |
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3.4.1 Heterogeneous String |
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110 | (5) |
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3.4.2 Ideal String Fixed at Both Ends |
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115 | (1) |
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3.4.3 Initial Conditions and Starting Transients |
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116 | (1) |
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116 | (5) |
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3.4.5 String with a Moving End |
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121 | (8) |
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3.4.6 Influence of Spatial Width and Duration of the Excitation |
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129 | (3) |
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132 | (1) |
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3.4.8 Driving-Point and Transfer Admittance |
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132 | (7) |
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3.4.9 Strings of Bowed Instruments |
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139 | (4) |
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3.5 Application to Percussion Instruments |
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143 | (30) |
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143 | (9) |
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3.5.2 Vibrations of Membranes In Vacuo |
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152 | (4) |
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3.5.3 Transverse Vibrations of Thin Plates |
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156 | (9) |
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3.5.4 Vibrations of Shells |
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165 | (5) |
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170 | (3) |
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173 | (26) |
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173 | (1) |
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4.2 Solutions Without Source, First Reflection |
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174 | (2) |
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4.3 Successive Reflections of Waves Produced by a Pulse Source |
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176 | (4) |
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176 | (2) |
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4.3.2 Reflections and Modes Periodicity |
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178 | (1) |
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4.3.3 Remark on the Reflection Function (4.3) |
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179 | (1) |
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4.4 One-Dimensional Green's Function |
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180 | (3) |
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4.4.1 Expression of the Green's Function |
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180 | (1) |
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4.4.2 Approximated "Practical" Realization |
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180 | (3) |
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4.5 Solutions Without Source in the Frequency Domain; Transmission Lines |
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183 | (3) |
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4.6 Green's Function in Sinusoidal Regime: the Particular Case of the Input Impedance |
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186 | (13) |
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4.6.1 Closed-Form Solution of the Green's Function |
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186 | (4) |
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190 | (3) |
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4.6.3 The Particular Case of a Source at the Input: Input Impedance |
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193 | (1) |
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4.6.4 Closed-Form Expression: Back to the Time Domain |
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194 | (3) |
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197 | (2) |
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5 Dissipation and Damping |
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199 | (60) |
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5.1 Introduction: Dissipative Phenomena in Musical Acoustics |
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199 | (1) |
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5.2 Generalizing the Concept of Mode |
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200 | (18) |
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5.2.1 Dissipative Discrete System |
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201 | (6) |
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207 | (7) |
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5.2.3 Continuous Complex Modes |
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214 | (4) |
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5.3 Damping Mechanisms in Solid Materials |
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218 | (11) |
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218 | (1) |
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5.3.2 String Damping Due to Air Viscosity |
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219 | (1) |
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5.3.3 Thermoelasticity in Orthotropic Plates |
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220 | (4) |
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224 | (4) |
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228 | (1) |
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5.4 Damping Mechanisms in Cylindrical Pipes |
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229 | (10) |
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229 | (2) |
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231 | (3) |
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5.4.3 Thermal Conduction Effects |
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234 | (4) |
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5.4.4 Radiation Dissipation at the Open End of the Pipe |
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238 | (1) |
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5.5 Transmission Line Equations |
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239 | (10) |
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5.5.1 General Equations and Solutions |
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239 | (2) |
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5.5.2 Numerical Values of Main Constants in Air |
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241 | (1) |
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241 | (7) |
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248 | (1) |
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5.6 Modes of a (Reed) Cylindrical Instrument |
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249 | (10) |
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249 | (1) |
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5.6.2 Modes Orthogonality Method (Without Radiation) |
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250 | (2) |
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5.6.3 Residue Calculus (Taking Radiation into Account) |
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252 | (3) |
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255 | (4) |
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259 | (36) |
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259 | (1) |
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6.2 Structure-Cavity Interaction |
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260 | (12) |
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6.2.1 Mechanical Oscillator Coupled to a Pipe |
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260 | (4) |
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6.2.2 Soundboard-Cavity Coupling in Stringed Instruments at Low Frequencies |
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264 | (8) |
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6.3 Coupling of Piano Strings |
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272 | (10) |
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6.3.1 General Equations of the Problem |
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273 | (4) |
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6.3.2 Formulation of the Problem in Terms of Forces |
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277 | (1) |
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6.3.3 Eigenvalues of the Strings-Bridge Coupled System |
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278 | (2) |
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280 | (2) |
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6.4 String-Soundboard Coupling |
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282 | (8) |
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6.4.1 Determination of Mass and Stiffness Matrices |
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283 | (2) |
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285 | (4) |
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6.4.3 Musical Consequences of the Coupling |
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289 | (1) |
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6.5 Soundboard-Bridge Coupling in Violins |
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290 | (5) |
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294 | (1) |
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7 Wind Instruments: Variable Cross Section and Toneholes |
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295 | (100) |
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295 | (1) |
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7.2 Pipes with Variable Cross Section: General Equations |
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296 | (5) |
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296 | (2) |
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7.2.2 Orthogonality of Modes |
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298 | (1) |
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7.2.3 Horn Equation with Boundary Layer Effects |
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299 | (1) |
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7.2.4 Lumped Elements of Horns |
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299 | (1) |
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7.2.5 Modal Expansion of the Input Impedance |
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300 | (1) |
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7.3 Pipes with Cross Section Discontinuities: First Approximation |
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301 | (21) |
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7.3.1 Elementary Model: Example of the Eigenfrequencies Equation: the Helmholtz Resonance |
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301 | (3) |
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7.3.2 Waves: Successive Reflections |
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304 | (3) |
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7.3.3 Modes of a Chimney Pipe: The Case of a Reed Instrument |
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307 | (5) |
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7.3.4 Brass Instrument Mouthpiece |
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312 | (5) |
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7.3.5 Cylindrical Instrument with Flute Mouthpiece |
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317 | (5) |
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322 | (14) |
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7.4.1 Equations and Solutions for a Lossless Conical Resonator |
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322 | (2) |
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7.4.2 Validity of the Horn Equation for a Truncated Cone |
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324 | (1) |
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7.4.3 Transfer Matrix of a Truncated Cone |
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325 | (1) |
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7.4.4 Eigenfrequencies: Elementary Approximations |
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325 | (3) |
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7.4.5 Equations with "Averaged" Losses, Transfer Matrices |
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328 | (1) |
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7.4.6 Modal Expansion for a Conical Reed Instrument |
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329 | (5) |
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7.4.7 Changes in Conicity |
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334 | (2) |
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7.5 Tubes with Variable Cross Section |
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336 | (11) |
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7.5.1 Bells of Brass Instruments: Analytical Solution |
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336 | (5) |
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7.5.2 Numerical Solution of the Horn Equation for Woodwinds and Brass Instruments |
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341 | (6) |
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7.6 Duct Modes and Simple Discontinuities |
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347 | (17) |
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7.6.1 Cavity Modes and Duct Modes: Cartesian Geometry |
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347 | (4) |
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7.6.2 Cylindrical Duct Modes |
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351 | (2) |
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7.6.3 Cross Section Discontinuities and Diaphragms |
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353 | (11) |
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7.7 Generalized Junction of Waveguides: Application to Toneholes |
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364 | (13) |
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364 | (2) |
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7.7.2 Two Waveguides Converging Into a Third |
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366 | (1) |
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367 | (2) |
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7.7.4 Bends in Cylindrical Tubes |
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369 | (1) |
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7.7.5 Toneholes and Derivations |
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370 | (7) |
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377 | (18) |
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7.8.1 Generalities About the Waves in a Periodic Medium |
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378 | (2) |
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7.8.2 Periodic Lattice of Open Holes |
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380 | (9) |
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389 | (6) |
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Part III Nonlinearities and Self-Oscillations |
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395 | (74) |
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8.1 An Example of Asymmetry: The Interrupted Pendulum |
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396 | (4) |
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397 | (1) |
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8.1.2 Solution by a Perturbation Method |
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397 | (3) |
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400 | (7) |
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401 | (1) |
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8.2.2 Solutions for the Forced Duffing Oscillator |
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402 | (4) |
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8.2.3 Generation of Subharmonics |
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406 | (1) |
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8.3 Nonlinear Vibrations of Strings |
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407 | (12) |
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8.3.1 Simplified Equations of Motion |
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408 | (2) |
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410 | (1) |
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8.3.3 Transverse-Longitudinal Coupling: Simplified Approach |
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411 | (3) |
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8.3.4 Exact Geometrical Model of Piano Strings with Intrinsic Stiffness |
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414 | (5) |
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8.4 Nonlinearities in Wind Instruments Resonators |
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419 | (10) |
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8.4.1 Nonlinear Propagation |
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419 | (4) |
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8.4.2 Nonlinear Distortion and Shock Waves, Method of Characteristics |
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423 | (1) |
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8.4.3 Competition Between Nonlinear Effects and Dissipation |
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424 | (1) |
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8.4.4 Shock Waves and Brassy Sounds |
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425 | (2) |
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8.4.5 Localized Nonlinear Dissipation |
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427 | (2) |
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8.5 Geometric Nonlinearities in Gongs and Cymbals |
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429 | (20) |
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8.5.1 Sinusoidal Forced Excitation |
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431 | (3) |
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8.5.2 Internal Resonances |
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434 | (1) |
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8.5.3 Weakly Nonlinear Regime |
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435 | (1) |
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8.5.4 Energy Transfer Through Combination of Resonances |
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436 | (7) |
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8.5.5 Nonlinear Mechanical Model |
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443 | (6) |
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449 | (7) |
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450 | (4) |
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8.6.2 Characterization of Chaos: Lyapunov Exponents |
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454 | (2) |
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8.7 Nonlinear Normal Modes |
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456 | (13) |
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456 | (1) |
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8.7.2 First Approach of Nonlinear Normal Modes |
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457 | (1) |
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8.7.3 Invariant Manifolds |
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458 | (3) |
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8.7.4 Calculation of Nonlinear Normal Modes |
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461 | (2) |
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463 | (1) |
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464 | (5) |
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469 | (90) |
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9.1 Background on Self-Sustained Oscillations |
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470 | (2) |
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9.2 Reed Instruments Models |
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472 | (17) |
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472 | (1) |
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9.2.2 Mechanical Response of a Reed: Experimental Data |
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473 | (5) |
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9.2.3 Dynamic of the Fluid Passing the Reed |
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478 | (4) |
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9.2.4 Reed Opening Area and Flow Rate |
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482 | (2) |
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9.2.5 Basic Model (Clarinet-Like Reed) |
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484 | (4) |
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9.2.6 Basic Model (Lip Reed) |
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488 | (1) |
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9.3 Behavior of the Two-Equation Model (Regimes, Existence and Stability, Transients) Without Reed Dynamics |
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489 | (16) |
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489 | (1) |
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9.3.2 Static Regime and "Ab Initio" Method |
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490 | (3) |
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9.3.3 Lossless Approximation for a Cylinder: Helmholtz Motion |
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493 | (8) |
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9.3.4 One-Mode Approximation |
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501 | (4) |
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9.4 Away from the Reed Resonance (Two-Equation Model): Steady-State Regimes |
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505 | (31) |
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9.4.1 Principle of the Harmonic Balance Method: First Harmonic Approximation |
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505 | (3) |
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9.4.2 Characteristic Equation and Instability Threshold of the Static Regime |
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508 | (1) |
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9.4.3 The Harmonic Balance Method: An Overview |
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509 | (1) |
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9.4.4 The Variable Truncation Method, and Its Application to Clarinet-Like Instruments |
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510 | (7) |
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9.4.5 Variation of the Playing Frequency with the Excitation Level |
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517 | (2) |
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9.4.6 Beating Reed and Sound Extinction |
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519 | (4) |
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9.4.7 Miscellaneous Considerations About Clarinet-Like Instruments |
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523 | (1) |
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9.4.8 Conical Reed Instruments |
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524 | (12) |
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9.5 Behavior of the 3-Equation Model with Reed Dynamics (Non-beating Reed) |
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536 | (23) |
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536 | (1) |
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9.5.2 Oscillation Threshold for an Inward-Striking Reed |
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537 | (10) |
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9.5.3 Oscillation Threshold for an Outward-Striking Reed |
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547 | (2) |
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9.5.4 Modal Approach of the Dynamical System |
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549 | (1) |
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9.5.5 Discussion of the Results |
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550 | (2) |
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552 | (7) |
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10 Flute-Like Instruments |
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559 | (48) |
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10.1 Introduction and General Description |
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559 | (7) |
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10.1.1 The Air Jet, Driving the Oscillation in Flutes |
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560 | (4) |
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10.1.2 The Sounds of Flutes |
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564 | (2) |
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10.2 A Global Model for the Instrument |
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566 | (5) |
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10.2.1 General Description |
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566 | (1) |
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10.2.2 Important Parameters |
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567 | (2) |
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10.2.3 Localized or Distributed Interaction? |
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569 | (2) |
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10.3 A Modeling for the Jet Oscillation |
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571 | (15) |
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571 | (4) |
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575 | (10) |
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585 | (1) |
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10.4 Aeroacoustic Sound Sources |
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586 | (11) |
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10.4.1 The Jet-Drive Model |
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587 | (2) |
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10.4.2 A Discrete Vortex Model |
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589 | (2) |
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10.4.3 Aeroacoustic Formulation |
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591 | (6) |
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10.5 A Lumped Model of the Oscillation in a Flute |
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597 | (6) |
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10.5.1 Nonlinear Losses at the Blowing Window |
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597 | (1) |
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10.5.2 Jet Velocities Fluctuations |
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598 | (3) |
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10.5.3 Direct Hydrodynamic Feedback |
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601 | (1) |
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10.5.4 The Minimal Oscillator |
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601 | (2) |
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10.6 Discussion About the Model |
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603 | (4) |
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605 | (2) |
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11 Bowed String Instruments |
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607 | (28) |
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607 | (2) |
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11.2 Bow-String Interaction |
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609 | (4) |
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11.2.1 Quasi-Static Models of Friction |
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609 | (2) |
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11.2.2 Tribology of Rosin |
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611 | (2) |
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613 | (1) |
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11.4 Dynamical Regimes of the Bowed String |
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614 | (16) |
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11.4.1 The Ideal Helmholtz Motion |
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616 | (6) |
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11.4.2 Real Helmholtz Motion |
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622 | (7) |
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629 | (1) |
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630 | (5) |
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630 | (5) |
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Part IV Radiation and Sound-Structure Interaction |
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12 Elementary Sources and Multipoles |
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635 | (60) |
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12.1 Introduction: Acoustical Radiation of Musical Instruments |
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635 | (3) |
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12.1.1 General Problem of Radiation |
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637 | (1) |
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638 | (1) |
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639 | (11) |
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12.3.1 Pressure and Velocity Fields |
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639 | (2) |
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12.3.2 Acoustic Intensity and Sound Power |
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641 | (1) |
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12.3.3 Force Exerted by the Fluid on the Sphere: Radiation Impedance |
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642 | (1) |
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12.3.4 Concept of Point Source |
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643 | (2) |
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645 | (5) |
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650 | (11) |
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12.4.1 Pressure and Velocity Field |
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650 | (1) |
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12.4.2 Acoustic Intensity and Radiated Pressure |
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651 | (2) |
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12.4.3 Concept of Elementary Dipole |
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653 | (2) |
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12.4.4 Distribution of Dipoles: Example of the Vibrating String |
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655 | (2) |
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657 | (4) |
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12.5 Radiation of a Source with Arbitrary Shape |
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661 | (20) |
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12.5.1 Kirchhoff--Helmholtz Integral |
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661 | (5) |
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12.5.2 Multipolar Decomposition |
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666 | (6) |
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12.5.3 Radiation of Sound in a Semi-Infinite Space |
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672 | (9) |
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12.6 Radiation of Sound Tubes |
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681 | (14) |
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12.6.1 Radiation Impedances |
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682 | (6) |
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12.6.2 Field Radiated by a Tube: Directivity |
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688 | (1) |
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12.6.3 Radiation by Two Tubes or Two Orifices |
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689 | (3) |
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692 | (3) |
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13 Radiation of Vibrating Structures |
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695 | (70) |
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695 | (1) |
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13.2 Basic Concepts in Structural Acoustics |
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696 | (13) |
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13.2.1 Vibrating Beam Coupled to an Infinite Fluid Medium: Modal Approach |
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697 | (5) |
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702 | (4) |
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706 | (3) |
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13.3 Radiation of an Infinite Thin Plate |
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709 | (18) |
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709 | (1) |
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13.3.2 Acoustic Equations |
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710 | (1) |
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13.3.3 Dispersion Equations and Critical Frequency |
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710 | (2) |
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13.3.4 Pressure, Velocity, and Acoustic Power |
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712 | (6) |
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13.3.5 Acoustic Loading of the Plate |
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718 | (1) |
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13.3.6 Dispersion Equation for the Acoustically Loaded Plate |
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719 | (1) |
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13.3.7 Radiation of a Point-Excited Plate |
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720 | (7) |
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13.4 Radiation from Finite Plates |
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727 | (20) |
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13.4.1 Spatial Fourier Transform |
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728 | (1) |
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13.4.2 Contribution of the Vibrating Modes to the Radiated Pressure |
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729 | (5) |
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13.4.3 Radiated Acoustic Power |
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734 | (10) |
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13.4.4 Radiation of Unbaffled Plates and Structural Volumes |
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744 | (3) |
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13.5 Radiation of an Axisymmetrical Nonplanar Source |
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747 | (7) |
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13.5.1 Dispersion Curves for Shells and Critical Frequency |
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748 | (1) |
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749 | (3) |
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13.5.3 Influence of the Source Shape |
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752 | (2) |
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13.6 Application to Stringed Instruments |
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754 | (11) |
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13.6.1 Selection of Materials and Merit Index |
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755 | (2) |
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13.6.2 Example of the Piano Soundboard |
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757 | (3) |
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13.6.3 Compromise Between Loudness and Tone Duration |
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760 | (1) |
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761 | (4) |
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14 Radiation of Complex Systems |
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765 | (64) |
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14.1 Example of the Vibraphone |
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766 | (7) |
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766 | (3) |
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14.1.2 Radiation of the Beam |
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769 | (1) |
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14.1.3 Radiation of the Resonator |
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770 | (3) |
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14.2 Example of the Kettledrum |
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773 | (23) |
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773 | (2) |
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14.2.2 Presentation of the Physical Model |
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775 | (4) |
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14.2.3 Eigenfrequencies, Damping Factors, and Tuning of the Instrument |
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779 | (6) |
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14.2.4 Acoustic and Vibratory Fields: Time-Domain Analysis |
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785 | (4) |
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14.2.5 Spatial Distribution of the Radiated Pressure. Radiation Efficiency |
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789 | (1) |
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14.2.6 Numerical Simulation of the Coupled Problem |
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790 | (6) |
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14.3 Example of the Guitar |
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796 | (10) |
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796 | (1) |
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797 | (2) |
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14.3.3 Specificity of the Numerical Guitar Model |
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799 | (1) |
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14.3.4 Admittance at the Bridge |
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800 | (2) |
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802 | (1) |
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14.3.6 Radiated Sound Field |
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803 | (1) |
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14.3.7 Acoustic Intensity and Power Balance |
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804 | (2) |
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14.4 Example of the Piano |
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806 | (9) |
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14.4.1 General Presentation of the Model |
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806 | (2) |
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14.4.2 Modal Analysis of the Soundboard |
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808 | (2) |
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14.4.3 Results of the Simulations |
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810 | (3) |
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14.4.4 Radiation and Directivity of the Piano |
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813 | (2) |
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14.5 Radiation of Wind Instruments with Several Orifices |
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815 | (14) |
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14.5.1 Open Flute at Low Frequencies |
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816 | (2) |
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14.5.2 Instruments with Toneholes |
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818 | (4) |
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14.5.3 Interaction of Two Tubes |
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822 | (3) |
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825 | (4) |
Glossary |
|
829 | (4) |
Author Index |
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833 | (6) |
Subject Index |
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839 | |