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Frequency characteristics of oppressive and vibratory feeling to low-frequency sound 

Author:  | Health, Noise

Although experimental results on oppressive and vibratory feelings due to low-frequency sound are widely known, those studies were conducted about 40 years ago in Japan and some questions remain to be examined. For example, “oppressive feeling” and “vibratory feeling” are generally unfamiliar terms, but it is not clear how these terms were explained to or understood by participants. In the present study, an experiment was conducted using a method similar to the previously reported method, and the frequency characteristics of sound that induced oppressive and vibratory feelings were reviewed. Using one-third octave band noise with center frequencies ranging from 10 Hz to 630 Hz, a laboratory experiment was conducted to investigate the sound pressure level at which oppressive or vibratory feeling tended to appear for each frequency. Participants were divided into two groups. One was provided an explanation of the meaning of oppressive and vibratory feelings, and the other was provided no such explanation, and results were compared between the groups. The results suggest that sound pressure levels where these feelings tended to occur were slightly different between the two groups. Furthermore, the feelings appeared even in the higher frequency bands compared with previous studies.

Makoto MORINAGA, Ippei YAMAMOTO, Tomohiro KOBAYASHI, Defense Facilities Environment Improvement Association, Japan
Koichi MAKINO, Hiroaki OCHIAI, Kobayasi Institute of Physical Research, Japan
Hideki TACHIBANA, University of Tokyo, Japan

Proceedings of the 23rd International Congress on Acoustics, 9–13 September 2019, Aachen, Germany: pages 1478–1483

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