Equal-loudness for pure tones were measured in a free filed in an effort to contribute to the full-scale revision of ISO 226. Sound pressure level was measured at seven points for pure tones from 31.5 Hz to 14 kHz. The results show that at frequencies below 1 kHz, the equal-loudness levels are significantly higher than those specified in ISO 226.
|ジャーナル||Journal of the Acoustical Society of Japan (E) (English translation of Nippon Onkyo Gakkaishi)|
|出版ステータス||Published - 1997|
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