Page 10 - The Master Handbook Of Acoustics
P. 10
ix
CONTENTS
Meters vs. the Ear 72
The Precedence Effect 73
Perception of Reflected Sound 75
Occupational and Recreational Deafness 76
Summary 79
Chapter 4 Sound Waves in the Free Field 83
Free Sound Field: Definition 83
Sound Divergence 84
Examples: Free-field sound divergence 84
Inverse square in enclosed spaces 87
Hemispherical propagation 88
Chapter 5 Speech, Music, and Noise 89
The Voice System 89
Artificial larynx 89
Sound spectrograph 90
Sound sources for speech 92
Vocal tract molding of speech 92
Formation of voiced sounds 94
Formation of unvoiced sounds 95
Putting it all together 95
Synthesized speech 96
Digital speech synthesis 97
Directionality of speech 98
Music 99
Wind instruments 101
Nonharmonic overtones 101
Dynamic range of speech and music 101
Power in Speech and Music 103
Frequency Range of Speech and Music 104
Future Dynamic-Range Requirements 104
Auditory Area 104
Noise 107
Noise—The good kind 108
Random noise 109
White and pink noise 111
Signal Distortion 112
Harmonic Distortion 114
