Effects of Very Low Frequency Tones on Auditory Thresholds

Author:

Jerger J.1,Alford B.1,Coats A.1,French B.2

Affiliation:

1. Baylor University College of Medicine, Houston, Texas

2. Manned Spacecraft Center, NASA, Houston, Texas

Abstract

Nineteen human subjects were exposed to repeated three-minute tones in the sound pressure level range from 119 to 144 dB and the frequency range from 2–22 cps. The tones were produced in an acoustic test booth by a piston-cylinder arrangement, driven by a variable speed direct current motor. Eight subjects showed no adverse effects. Temporary threshold shifts (TTS) of 10 to 22 dB in the frequency range from 3 000 to 8 000 cps were observed in the remaining 11 subjects. In addition, the 7 and 12 cps signals produced considerable masking over the frequency range from 100 to 4 000 cps.

Publisher

American Speech Language Hearing Association

Subject

Otorhinolaryngology

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