Effects of Very Low Frequency Tones on Auditory Thresholds
- 1 March 1966
- journal article
- research article
- Published by American Speech Language Hearing Association in Journal of Speech and Hearing Research
- Vol. 9 (1) , 150-160
- https://doi.org/10.1044/jshr.0901.150
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.Keywords
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