About the Authors |
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xiii | |
Acknowledgements |
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xviii | |
Preface |
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xix | |
Introduction |
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xx | |
1 What Is a Loudspeaker? |
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1 | (20) |
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1.1 A Brief Look at the Concept |
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1 | (1) |
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1.2 A Little History and Some Background |
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2 | (2) |
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4 | (1) |
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5 | (4) |
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1.4.1 Acoustic-Wave Propagation |
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5 | (2) |
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1.4.2 Mechanical and Acoustic Impedance |
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7 | (2) |
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1.4.3 Impedance in Loudspeakers |
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9 | (1) |
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1.5 The Practical Moving-Coil Cone Loudspeaker |
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9 | (5) |
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1.5.1 The Combined Response |
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11 | (3) |
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1.6 Resistive and Reactive Loads |
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14 | (5) |
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19 | (1) |
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20 | (1) |
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20 | (1) |
2 Diversity of Design |
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21 | (46) |
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2.1 Moving-Coil Cone Loudspeakers |
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21 | (17) |
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22 | (7) |
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2.1.1.1 Using Multiple Cones |
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28 | (1) |
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29 | (2) |
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31 | (2) |
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33 | (1) |
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2.1.5 The Voice-Coil Assembly |
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34 | (1) |
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35 | (2) |
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37 | (1) |
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2.1.8 The Complete System |
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38 | (1) |
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38 | (5) |
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2.2.1 Hard and Soft Domes |
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39 | (4) |
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43 | (4) |
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47 | (2) |
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2.5 Heil Air-Motion Transformers |
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49 | (2) |
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2.6 Bending-Mode Loudspeakers |
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51 | (8) |
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2.6.1 Distributed-Mode Loudspeakers |
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51 | (4) |
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2.6.2 Panel/Piston Combinations |
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55 | (1) |
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2.6.3 Discrete Layered Sound |
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56 | (1) |
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2.6.4 Balanced-Mode Radiators |
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57 | (1) |
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2.6.5 Manger Sound Transducer - Manger Schallwandler (MSW) |
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58 | (1) |
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59 | (2) |
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2.7.1 Piezoelectric Devices |
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59 | (1) |
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59 | (2) |
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2.8 Electrostatic Loudspeakers |
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61 | (4) |
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2.9 Electromagnetic Planar Loudspeakers |
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65 | (1) |
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65 | (1) |
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66 | (1) |
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66 | (1) |
3 Loudspeaker Cabinets |
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67 | (38) |
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3.1 The Concept of the Infinite Baffle |
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67 | (2) |
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69 | (4) |
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3.2.1 Acoustic Suspensions |
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73 | (1) |
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73 | (4) |
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77 | (6) |
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3.4.1 Modern Transmission Lines |
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79 | (4) |
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83 | (1) |
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84 | (1) |
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3.7 Series-Driver Operation and Isobaric Loudspeakers |
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85 | (2) |
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87 | (1) |
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3.9 Cabinet-Lining Materials |
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88 | (1) |
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3.10 Cabinet Constructions |
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89 | (1) |
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3.11 Cabinet Shapes and Diffraction Effects |
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90 | (4) |
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94 | (1) |
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94 | (2) |
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3.14 Some Practical Considerations |
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96 | (7) |
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103 | (2) |
4 Horns |
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105 | (32) |
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4.1 The Horn as a Transformer |
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105 | (5) |
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110 | (2) |
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4.3 Horn-Design Compromises |
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112 | (1) |
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113 | (2) |
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4.5 Examples of Non-Linear Acoustics in Loudspeakers |
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115 | (1) |
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4.6 Practical Horns in Studios and Homes |
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115 | (2) |
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4.7 Implications for Practical Horn-Design Parameters |
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117 | (4) |
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121 | (1) |
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4.9 General Horn Characteristics |
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122 | (2) |
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124 | (3) |
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127 | (2) |
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129 | (2) |
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4.13 Materials of Construction |
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131 | (1) |
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4.14 Vestigial Horns and 'Waveguides' |
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132 | (1) |
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133 | (1) |
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134 | (1) |
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135 | (1) |
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136 | (1) |
5 Crossovers |
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137 | (28) |
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137 | (2) |
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5.2 Reconstruction Problems |
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139 | (5) |
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5.3 Orders, Slopes, and Shapes |
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144 | (7) |
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5.3.1 High-Order Digital Crossover Filters |
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150 | (1) |
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151 | (2) |
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153 | (3) |
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5.5.1 Minimum- and Non-Minimum-Phase Effects |
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154 | (1) |
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5.5.2 Corrective Measures and Side-Effects |
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155 | (1) |
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5.6 Active versus Passive Crossovers |
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156 | (4) |
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5.7 Physical Compensation of Crossover Delay |
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160 | (2) |
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162 | (1) |
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163 | (1) |
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164 | (1) |
6 Amplifiers and Loudspeaker Cables - A General Review |
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165 | (44) |
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6.1 Amplifiers - An Overview |
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165 | (2) |
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6.2 Basic Requirements for Current and Voltage Output |
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167 | (1) |
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168 | (3) |
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6.4 Non-Linear Distortions |
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171 | (1) |
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6.5 Amplifier Classes and Modes of Operation |
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172 | (5) |
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172 | (2) |
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6.5.2 Class A Derivatives |
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174 | (1) |
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6.5.3 Class B and Class AB |
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174 | (1) |
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175 | (2) |
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6.5.5 Class G and Class H |
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177 | (1) |
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177 | (1) |
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6.7 Choosing an Amplifier |
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178 | (2) |
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6.8 Loudspeaker Cables and Their Effect on System Performance |
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180 | (4) |
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180 | (2) |
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182 | (1) |
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6.8.3 Cable Designs for Loudspeaker Use |
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183 | (1) |
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6.9 The Amplifier/Loudspeaker Interface |
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184 | (3) |
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6.10 Some Provable Characteristics of Cable Performance |
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187 | (14) |
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6.11 Some Passing Comments |
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201 | (2) |
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203 | (1) |
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6.13 Polyamplification and Multi-Amplification |
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204 | (2) |
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206 | (1) |
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207 | (1) |
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207 | (2) |
7 Loudspeaker Behaviour in Rooms |
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209 | (32) |
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7.1 The Anechoic and Reverberation Chambers |
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209 | (4) |
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7.2 Boundary Loading and Room Gain |
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213 | (8) |
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7.2.1 Restriction of Radiating Space |
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215 | (3) |
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7.2.2 The Mirrored Room and Mutual Coupling |
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218 | (3) |
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221 | (3) |
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222 | (2) |
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7.4 Flush-Mounting of Loudspeakers |
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224 | (1) |
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7.5 Multi-Channel Considerations and Phantom Imaging |
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225 | (4) |
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7.6 Stereo Perception in Rooms |
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229 | (1) |
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7.7 Rooms for Critical Listening |
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230 | (3) |
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7.8 Analogue and Digital Response Correction |
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233 | (3) |
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7.9 Minimum- and Non-Minimum-Phase Responses |
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236 | (2) |
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7.10 Correction of Loudspeakers in Rooms |
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238 | (1) |
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239 | (1) |
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239 | (2) |
8 Form Follows Function |
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241 | (54) |
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241 | (2) |
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243 | (23) |
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246 | (6) |
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8.2.2 Proportional Costs and Adverse Myths |
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252 | (1) |
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8.2.3 Basic Low-Frequency Options |
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253 | (3) |
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8.2.4 Consequences of Crossover Points |
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256 | (4) |
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8.2.5 Power Considerations |
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260 | (3) |
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8.2.6 Interfacing with the Rooms |
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263 | (2) |
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265 | (1) |
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266 | (8) |
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273 | (1) |
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8.4 Mastering Loudspeakers |
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274 | (5) |
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8.5 Domestic Loudspeakers |
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279 | (2) |
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8.6 Musical-Instrument Loudspeakers |
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281 | (4) |
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284 | (1) |
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8.7 Directivity Considerations |
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285 | (5) |
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290 | (2) |
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292 | (1) |
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292 | (3) |
9 Subjective and Objective Assessment |
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295 | (40) |
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9.1 The General Situation |
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295 | (1) |
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9.2 Test Signals and Analysis |
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296 | (28) |
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9.2.1 Frequency-Response Plots |
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298 | (3) |
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301 | (3) |
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9.2.3 Harmonic Distortion |
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304 | (2) |
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9.2.4 lntermodulation Distortion |
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306 | (5) |
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9.2.5 Delta Functions and Step Functions |
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311 | (4) |
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9.2.6 Acoustic-Source Plots |
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315 | (3) |
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318 | (2) |
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9.2.8 Modulation Transfer Functions |
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320 | (4) |
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9.2.8.1 Application of Room Equalisation |
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321 | (3) |
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324 | (1) |
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9.3 Sound Fields and Human Perception |
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324 | (7) |
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9.3.1 Further Perceptual Considerations |
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327 | (4) |
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9.4 Toole's 'Circle of Confusion' |
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331 | (1) |
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332 | (1) |
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333 | (2) |
10 The Mix, the Music, and the Monitors - The Instability of Perception |
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335 | (10) |
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10.1 Physics or Psychology? |
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335 | (1) |
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10.2 The Musical Dependence of Compatibility |
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336 | (2) |
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10.2.1 Sine Waves and Pink Noise |
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337 | (1) |
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10.3 Real Responses versus Preconceived Ideas |
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338 | (5) |
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343 | (2) |
11 Low-Frequency and Transient-Response Dilemmas |
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345 | (40) |
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11.1 The Great Low-Frequency Deception |
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345 | (6) |
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348 | (1) |
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11.1.2 Size, Weight, and Sensitivity |
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349 | (1) |
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11.1.3 Further Consequences of Small Size |
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350 | (1) |
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11.2 Commercial Solutions |
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351 | (7) |
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352 | (4) |
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11.2.2 The Transient Trade-Off |
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356 | (2) |
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11.3 The Evolution of the Desk-Top Monitor |
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358 | (5) |
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11.4 The Great Time Deception |
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363 | (1) |
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11.5 Resonant Tails and One-Note Bass |
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364 | (2) |
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11.6 The Masking of Detail |
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366 | (2) |
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11.7 Theoretical Equalisation and Excess Phase |
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368 | (3) |
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11.8 Modulation Transfer Function and a New Type of Frequency-Response Plot |
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371 | (11) |
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11.8.1 Factors that Influence MTF-Based Analysis |
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374 | (1) |
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11.8.2 Evaluating Monitors with the 'Bass Transmission Index' |
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375 | (7) |
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382 | (1) |
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382 | (3) |
12 The Challenges of Surround Sound |
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385 | (24) |
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12.1 The Early Days of Surround |
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385 | (5) |
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390 | (3) |
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393 | (1) |
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12.4 Sub-Woofers - Discrete and Managed |
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394 | (3) |
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12.5 Size-Versus-Performance Compromises |
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397 | (4) |
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12.6 Compound Sub-Woofers and Electronic Control |
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401 | (3) |
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12.7 System Considerations |
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404 | (3) |
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407 | (2) |
13 Loudspeakers for Cinema Soundtrack Mixing |
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409 | (36) |
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409 | (1) |
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13.2 The Early Days of Cinema Sound |
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410 | (1) |
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13.3 The Introduction of Digital Soundtracks |
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411 | (3) |
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414 | (2) |
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13.5 Dynamic Consequences |
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416 | (2) |
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13.6 System Limitations, Screen Losses, and the X-Curve |
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418 | (2) |
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13.7 Loudspeakers in the Fully Digital Era |
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420 | (2) |
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13.8 Standard Level Calibration |
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422 | (1) |
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13.9 The Distribution within Mixes |
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423 | (1) |
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13.10 Realistic Performance Specifications |
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424 | (15) |
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13.10.1 Screen Loudspeakers |
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424 | (9) |
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432 | (1) |
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13.10.2 Surround Loudspeakers |
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433 | (4) |
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437 | (2) |
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13.11 Amplification Systems |
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439 | (1) |
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440 | (1) |
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441 | (2) |
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443 | (2) |
14 What to Measure: And Why - The Influence of Advanced Measurement and Psychoacoustic Concepts on Loudspeaker Design |
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445 | (18) |
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14.1 Historical Development |
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445 | (5) |
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14.1.1 What Remains Relevant? |
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448 | (2) |
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14.2 The Advent of Digital Measurement Systems |
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450 | (1) |
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14.3 Computer-Aided and Numerical Modelling |
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451 | (4) |
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14.4 Digital Signal Processing of Loudspeaker Systems |
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455 | (6) |
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14.4.1 Sampling Rates and Bandwidths |
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457 | (1) |
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14.4.2 Implementation and Analysis |
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458 | (1) |
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459 | (2) |
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461 | (2) |
Glossary of Terms |
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463 | (24) |
Index |
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487 | |