A 1/3 Octave-Band Noise Generator for Sound-Field Audiometric Measurements The design of a low-cost 1/3 octave-band noise generator is presented. This device produces 1/3 octave bands of noise with center frequencies from 100 to 10,000 Hz using a recently introduced switch-capacitor filter with a frequency response which is similar to that of the 1/2 octave filters in the GR ... Reports
Reports  |   February 01, 1982
A 1/3 Octave-Band Noise Generator for Sound-Field Audiometric Measurements
 
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Article Information
Reports   |   February 01, 1982
A 1/3 Octave-Band Noise Generator for Sound-Field Audiometric Measurements
Journal of Speech and Hearing Disorders, February 1982, Vol. 47, 84-88. doi:10.1044/jshd.4701.84
History: Received August 15, 1980 , Accepted April 4, 1981
 
Journal of Speech and Hearing Disorders, February 1982, Vol. 47, 84-88. doi:10.1044/jshd.4701.84
History: Received August 15, 1980; Accepted April 4, 1981

The design of a low-cost 1/3 octave-band noise generator is presented. This device produces 1/3 octave bands of noise with center frequencies from 100 to 10,000 Hz using a recently introduced switch-capacitor filter with a frequency response which is similar to that of the 1/2 octave filters in the GR 1925 multifilter. The spectrum level of the noise bands produce by this device falls at a rate of 60 dB/octave or more. The noise generator may be used with an audiometer for sound-field measurements in non-anechoic audiometric testing rooms or for earphone measurements. It may also be used as a 1/3 octave-band filter with a center frequency from 100 to 10,000 Hz or as an octave-band filter with a center frequency from 125 to 8000 Hz.

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