Page 12 - The Master Handbook Of Acoustics

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CONTENTS

Artificial Reverberation: The Past 155
Artificial Reverberation: The Future 156
Arrival Time Gap 157
The Sabine Equation 159
Reverberation calculation: Example 1 160
Reverberation calculation: Example 2 162
Reverberant Field 162

Chapter 8 Control of Interfering Noise 165
Noise Sources and Some Solutions 166
Airborne noise 167
Noise carried by structure 167
Noise transmitted by diaphragm action 168
Sound-insulating walls 168
Porous materials 169
Sound Transmission Classification (STC) 170
Comparison of Wall Structures 171
Double Windows 173
Sound-Insulating Doors 175
Noise and room resonances 176
Active noise control 177

Chapter 9 Absorption of Sound 179
Dissipation of Sound Energy 179
Evaluation of Sound Absorption 181
Reverberation Chamber Method 182
Impedance Tube Method 182
Tone-Burst Method 185
Mounting of Absorbents 186
Mid/High Frequency Absorption by Porosity 187
Glass fiber: Building insulation 189
Glass fiber: Boards 190
Acoustical tile 190
Effect of Thickness of Absorbent 190
Effect of Airspace behind Absorbent 191
Effect of Density of Absorbent 192