Speech and Hearing 1929

by Harvey Fletcher

Copyright 1929

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Title page 		 i-3
Copyright page  i-4
PREFACE  i-5
CONTENTS  i-9
INTRODUCTION  i-11

Part One: Speech

Chapter I: Speech and Hearing   2
Chapter II: Characteristics of Speech Waves   14
Chapter III: Speech Power   64
Chapter IV: Frequency of Occurrence of the different speech sounds   81

Part Two: Music and Noise

Chapter I: Physical Properties of Musical Sounds   87
Chapter II: Noise   99

Part Three: Hearing

Chapter I: Mechanism of Hearing   111
Chapter II: Limits of Audition   132
Chapter III: Minimum Perceptible Differences in Sound   145
Chapter IV: Masking Effects   167
Chapter V: Binaural Beats   188
Chapter VI: Methods of Testing the Acuity of Hearing   198

Part Four: The perception of Speech and Music

Chapter I: The Loudness of Sounds   225
Chapter II: The recognition of the pitch of musical tones   245
Chapter III: Methods of Measuring the Recognition of Speech Sounds   255
Chapter IV: Effects of Changes in the Received Intensity of Speech sounds upon their Recognition   270
Chapter V: Effect of Frequency Distortions upon the Recgonition of Speech Sounds   279
Chapter VI: Effect of Other Types of Distortion upon the Recognition of Speech Sounds   290
Chapter VII: Effect of Noise and Deafness upon the Recognition of Speech Sounds   297

Appendices

Appendix A   305
Appendix B   308
Appendix C   312
Appendix D   314
Appendix E   317
Index of Names
   321
Subject Index (A-Audition)   323
Subject Index (Auditory Masking-Deafness)   324
Subject Index (Deafness-Harmonics)   325
Subject Index (Harmonics-Level)   326
Subject Index (Limits-Noise)   327
Subject Index (Objective tones-Power)   328
Subject Index (Pressure-Spectra)   329
Subject Index (Speech-Tympanic membrane)   330
Subject Index (Units-Words)   331