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Snowmobile Engine Noise and Hearing
Fred H. Bess, PhD;
Robert E. Poynor, MA
Arch Otolaryngol. 1972;95(2):164-168.
Abstract
Temporary threshold shifts (TTSs) were measured in 17 subjects (12 drivers and five riders) following 120 minutes of snowmobile noise exposure. All subjects were found to exhibit marked TTS at frequencies above 1,000 hertz. Predictably, the greatest amount of TTS occurred at 4,000 Hz. An acoustic analysis of the snowmobiles represented in this study revealed that the noise levels exceeded damage risk criteria for two hours exposure. One snowmobile was found to produce as much as 136 dBA at full throttle.
Author Affiliations
Mount Pleasant, Mich
From the Department of Speech and Dramatic Arts, Area of Communication Disorders, Central Michigan University, Mount Pleasant.
Footnotes
Accepted for publication Aug 27, 1971.
Read before the annual meeting of the American Speech and Hearing Association, New York, Nov 22, 1970.
Reprint requests to Hearing Clinic, Central Michigan University, Mount Pleasant, Mich 48858 (Dr. Bess).
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