Effects of Very Low Frequency Tones on Auditory Thresholds 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 ... Research Article
Research Article  |   March 01, 1966
Effects of Very Low Frequency Tones on Auditory Thresholds
 
Author Affiliations & Notes
  • J. Jerger
    Baylor University College of Medicine, Houston, Texas
  • B. Alford
    Baylor University College of Medicine, Houston, Texas
  • A. Coats
    Baylor University College of Medicine, Houston, Texas
  • B. French
    Manned Spacecraft Center, NASA, Houston, Texas
Article Information
Research Articles
Research Article   |   March 01, 1966
Effects of Very Low Frequency Tones on Auditory Thresholds
Journal of Speech, Language, and Hearing Research, March 1966, Vol. 9, 150-160. doi:10.1044/jshr.0901.150
History: Received May 14, 1965
 
Journal of Speech, Language, and Hearing Research, March 1966, Vol. 9, 150-160. doi:10.1044/jshr.0901.150
History: Received May 14, 1965

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.

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