Handbook for Sound Engineers, 4th Edition

Chapter 46

Test and Measurement

 

by Pat Brown

46.1 Test and Measurement

46.1.1 Why Test?

46.2 Electrical Testing

46.3 Acoustical Testing

46.3.1 Sound Level Measurements

46.3.1.1 Conclusion

46.3.2 Detailed Sound Measurements

46.3.2.1 Sound Persistence in Enclosed Spaces

46.3.2.2 Amplitude versus Time

46.3.2.3 The Transfer Function

46.3.3 Measurement Systems

46.3.3.1 Alternate Perspectives

46.3.4 Testing Methods

46.3.4.1 FFT Measurements

46.3.4.2 Dual-Channel FFT

46.3.4.3 Maximum-Length Sequence

46.3.4.4 Time-Delay Spectrometry (TDS)

46.3.5 Preparation

46.3.5.1 Dissecting the Impulse Response

46.3.5.2 The Envelope-Time Curve

46.3.5.3 A Global Look

46.3.5.4 Time Window Length

46.3.5.5 Acoustic Wavelengths

46.3.5.6 Microphone Placement

46.3.5.7 ...