Comparison of loudness functions suitable for drawing equal-loudness-level contours
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概要
- 論文の詳細を見る
Five kinds of loudness functions were examined to determine a suitable function for drawing equal-loudness-level contours based on experimental data. First, equal-loudness relations were measured between 125-Hz and 1-kHz pure tones from 70 phons down to 5 phons and thresholds of hearing were measured at both frequencies. Then, five model equations expressing the equal loudness relation were derived from the five loudness functions, and these equations were fitted to the data. The results showed that three of them could well explain the equal-loudness relation down to 5 phons. Among the three functions, the loudness function proposed by Zwislocki and Hellman [J. Acoust. Soc. Am., 32, 924 (1960)] and Lochner and Burger [J. Acoust. Soc. Am., 33, 1705-1707 (1961)] was regarded as the most appropriate function for drawing equal-loudness-level contours, because the number of parameters of the function was fewer than that in the other two and the threshold of hearing could be used for the fitting as a datum of the equal-loudness relation, resulting in a more stable estimation of the parameters of the model equation.
- 社団法人日本音響学会の論文
著者
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Kumagai Masazumi
Sendai national College of technology
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Kumagai Masazumi
Akita Prefectural University
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Suzuki Yoiti
Research Institute For Electrical Communication/graduate School Of Information Sciences Tohoku Unive
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Takeshima Hisashi
Sendai National College of Technology
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Ozawa Kenji
Yamanashi University
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Sone Toshio
Akita Prefectural University
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Tachibana H
Sendai National College Of Technology
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