A Sound Engineers Guide to Audio Test and Measurement

by Ballou; Glen

• ISBN13: 9780240812656
• ISBN10: 0240812654
• Format: Nonspecific Binding
• Copyright: 2009-07-31
• Publisher: Routledge

Summary

Timesaving, one stop on the job reference

Author Biography

Glen Ballou is a graduate of General Motors Institute, now called Kettering University, with a bachelor's degree in Industrial Engineering and a minor in Electrical Engineering. He has been a Syn-Aud-Con representative, has served as a governor, convention chairman, papers chairman and facilities chairman of the Audio Engineering Society (AES) and has been a member of the Society of Motion Picture and Television Engineers (SMPTE) He has been a contributor to Sound and Video Contractor, and Church Production magazine on a variety of subjects. Glen also wrote the chapter on capacitor and inductors for the CRC Press publication The Electrical Engineer Handbook. Glen is owner of Innovative Communications, a company that specializes in room acoustics and sound system design.

Table of Contents

Test and Measurement
Test and Measurement	p. 1
Why Test?	p. 2
Electrical Testing	p. 2
Acoustical Testing	p. 3
Sound Level Measurements	p. 4
Conclusion	p. 10
Detailed Sound Measurements	p. 11
Sound Persistence in Enclosed Spaces	p. 12
Amplitude versus Time	p. 13
The Transfer Function	p. 16
Measurement Systems	p. 17
Alternate Perspectives	p. 19
Testing Methods	p. 19
FFT Measurements	p. 20
Dual-Channel FFT	p. 21
Maximum-Length Sequence	p. 22
Time-Delay Spectrometry (TDS)	p. 22
Preparation	p. 23
Dissecting the Impulse Response	p. 26
The Envelope-Time Curve	p. 26
A Global Look	p. 27
Time Window Length	p. 28
Acoustic Wavelengths	p. 28
Microphone Placement	p. 29
Estimate the Critical Distance DC	p. 30
Common Factors to All Measurement Systems	p. 31
Data Windows	p. 37
A Methodical Approach	p. 38
Human Perception	p. 42
Percentage Articulation Loss of Consonants (%Alcons)	p. 42
Speech Transmission Index (STI)	p. 44
Polarity	p. 44
The Battery Test	p. 45
Polarity Testers	p. 45
Impulse Response Tests	p. 46
Conclusion	p. 47
References	p. 48
Bibliography	p. 48
What's the Ear For? How to Protect It
What's the Ear For?	p. 49
What Does Hearing Damage Sound Like?	p. 50
How Loud Is Too Loud? OSHA, NIOSH, EPA, WHO	p. 50
Indicators of Hearing Damage	p. 55
Protecting Your Hearing	p. 56
Protecting Concert-Goers and Other Listeners	p. 57
Protecting the Community	p. 58
Too Much of a Good Thing	p. 59
A Compliance and Enforcement Tool	p. 61
The SLARM Solution™	p. 61
SLARMSoft™ Software Suite	p. 62
SLARM™ Operation	p. 65
Summary	p. 74
Fundamentals and Units of Measurement
Units of Measurement	p. 75
SI System	p. 76
Fundamental Quantities	p. 78
Derived Quantities	p. 78
Definition of the Quantities	p. 78
Radio Frequency Spectrum	p. 95
Decibel (dB)	p. 96
Sound Pressure Level	p. 104
Sound System Quantities and Design Formulas	p. 105
ISO Numbers	p. 115
Greek Alphabet	p. 117
Audio Standards	p. 117
Audio Frequency Range	p. 117
Common Conversion Factors	p. 127
Technical Abbreviations	p. 130
Surface Area and Volume Equations	p. 165
Bibliography	p. 174
Index	p. 175
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