Abstract
In this paper, the relationship between sound pressure and distance is described. We carried out an experiment, as a fundamental study to furnish a machine with hearing characteristics of humans, on how accurately the intensity of a sound that is audible to humans and the distance from the sound source there of can be presumed. The method employed was AHP analysis. As a result of the experiment, the relationship between the intensity of the sound which a subject heard and the distance from the sound source was found to be consistent. The sound intensity had a value similar to the theoretical value in a range where the distance from the sound source was up to 1 m. The characteristics according to the frequency were clarified by the study of six kinds of selected frequencies of the sound source. The basic data of the intensity of the human sound and the correspondence of both near and far distances were obtained.
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