抄録
Noises are evaluated by auditory sense and psychological influence. This paper reports and discusses the results of experiment on perception of stationary sounds. Experiment was carried out as follows. The noises used in this experiment were 192 sounds. They are pure tone, warble tone and octave band noise of 63, 125, 500, 1000, 2000, 4000, 8000 Hz (60〜90 dB, continuous sounds and intermitted sounds). Fourteen observers made to listen to and evaluate the sounds by comparing them with a standard noise (80 dB Pink noise) by Method of Magnitude Estimation. The experimental results, shown, are the geometric average of observer's data. There is great correlation between estimated noisiness and sound pressure level. In comparison of the experimental results with loudness contours (Fletcher-Munson's Robinson-Dadson's), the following became clear. 63〜1000 Hz sounds are estimated almost equivalently to Fletcher-Munson's loudness contours. In comparison of the experimental results with Steven's "Loudness Index" and Kryter-Pearsons's "Noy", 2000〜4000 Hz sounds are estimated differently to this Kryter-Pearsons's Curve. Continuous sounds are estimated noisier than intermitted sounds.
