Page 11 - The Master Handbook Of Acoustics

x CONTENTS

Chapter 6 Analog and Digital Signal Processing 119

Resonance 120
Filters 122
Active filters 123
Analog vs. digital filters 124
Digitization 125
Quantization 126
Digital filters 126
Application of Digital Signal Processing (DSP) 105
Application of DSP to Room Equalization 106

Chapter 7 Reverberation 129

Reverberation and Normal Modes 130
Growth of Sound in a Room 132
Decay of Sound in a Room 134
Idealized Growth and Decay of Sound 134
Reverberation Time 135
Measuring Reverberation Time 137
Impulse Sound Sources 137
Steady-State Sources 138
Equipment 138
Measurement Procedure 140
Analysis of decay traces 140
Mode Decay Variations 142
Writing speed 143
Frequency effect 144
Reverberation Time Variation with Position 145
Acoustically Coupled Spaces 146
Electroacoustically Coupled Spaces 146
Decay rate 147
Eliminating decay fluctuations 147
Influence of Reverberation on Speech 148
Influence of Reverberation on Music 149
Optimum Reverberation Time 150
Bass rise of reverberation time 152
Living room reverberation time 154