Frequency characteristics of oppressive and vibratory feeling to low-frequency sound
* Presenting author
Although the threshold for oppressive and vibratory feeling for low frequency sound are widely known, the experiments based thereon were conducted about 40 years ago in Japan, and there are some questions to be examined. For example, although the term “oppressive and vibratory feeling” is generally unfamiliar words, it is unknown how the instruction was provided to the participants about the meaning of the term. In the present study, an experiment using similar method to the previous study was conducted, and the threshold of the feeling was reviewed. Using one-third octave band noises with the center frequency in the range from 10 Hz to 630 Hz, laboratory experiment was conducted to investigate the value of sound pressure level where oppressive and vibratory feeling preferentially appeared for each frequency. Participants were divided into two groups; one is the group provided instruction for the meaning of oppressive and vibratory feeling and the other is without such detailed instruction, and the results were compared. It was suggested that the sound pressure level where the feeling preferentially occurs is slightly different between the two groups. Furthermore, it was found that the feeling appeared even in the higher frequency band compared with the previous study.