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Appendix B: American National Standards on Acoustics
Pages 279-282

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From page 279...
... of test signals presented at reference equivalent threshold levels specified in American National Standard S3.6-1996 American National Standard Specification of Audiometers. The MPANLs are specified from 125 to 8000 Hz in octave and one-third octave band intervals for two audiometric testing conditions (ears covered and ears not covered)
From page 280...
... The audiometers covered in this specification are devices designed for use in determining the hearing threshold of an individual in comparison with a chosen standard reference threshold level. This standard provides specifications and tolerances for pure-tone, speech, and masking levels and describes the minimum test capabilities of different types of audiometers.
From page 281...
... Among the test methods described are output sound pressure level (SPL) with a 90-dB input SPL, full-on gain, frequency response, harmonic distortion, equivalent input noise, current drain, induction-coil sensitivity, and static and dynamic characteristics of automatic gain control (AGC)
From page 282...
... The noise test signal specified herein has been employed by the National Bureau of Standards for over 20 years in testing hearing aids. Among the tests described are noise saturation SPL, noise gain, frequency response, family of frequency response curves, and output versus input characteristic.

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