Precision Measurements of Equal-loudness Contours

等响度轮廓的精确测量

• 批准号: 01550346
• 负责人: KUMAGAI Masazumi
• 金额: $ 0.32万
• 依托单位: Sendai National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550346/
• 关键词: Loudness; Equal-loudness contours; Minimum auduble field; Head-related transfer function; 等ラウドネス曲線

A large anechoic room at Electro-technical Laboratory was used for experiments in order to get new equal-loudness contours and minimum audible field (MAF). The frequency ranges were 31.5 Hz to 12.5 kHz for 20 phon, 31.5Hz to 8 KHz for 40 phon and 63 Hz to 8 kHz for 70 phon equal-loudness contour, and31.5 Hz to 16 kHz for MAF.The results obtained are summarized as follows ;(1) The values of equal-loudness level below 1 kHz are higher than those of ISO 226. The maximum difference amounts to 15 dB.(2) The MAF curve obtained is almost identical with that of ISO 226 except that out curve shows 3 to 4 dB higher in the frequency range below 160 Hz and 2 to 3 dB lower in the range above 400 Hz.(3) A small peak is observed in the region between 1 to 2 kHz both on low level equal-loudness contours and MAF curve. This peak has not been observed in the datas of either ISO 226 or of other previous studies. THe origin of this peak is attributed to the effects of head-related transfer function.

为了得到新的等响度轮廓线和最小可听场（MAF），在电工实验室的大型消声室进行了实验。20声道的频率范围为31.5Hz至12.5 kHz， 40声道的频率范围为31.5Hz至8 kHz， 70声道等响度轮廓的频率范围为63 Hz至8 kHz， MAF的频率范围为31.5Hz至16 kHz。所得结果总结如下：(1)低于1khz的等响度值高于iso226。最大差值可达15db。(2)所得的MAF曲线与iso226的MAF曲线几乎相同，只是在160 Hz以下的频率范围内，MAF曲线高3 ~ 4 dB，在400 Hz以上的频率范围内，MAF曲线低2 ~ 3 dB。(3)在低电平等响度曲线和MAF曲线上，在1 ~ 2 kHz范围内都观察到一个小的峰值。在iso226或其他先前的研究数据中都没有观察到这个峰值。这一峰值的起源归因于头部相关传递函数的影响。

项目成果

鈴木 陽一,曽根 敏夫,竹島 久志,熊谷 正純,三浦 甫: "等ラウドネスレベル曲線の見直しについて" 日本音響学会誌. 46. 420-426 (1990)

Yoichi Suzuki、Toshio Sone、Hisashi Takeshima、Masazumi Kumagai 和 Hajime Miura：“等响度曲线综述”日本声学学会杂志 46. 420-426 (1990)。

T.Sone,Y.Suzuki,H.Takeshima,M.Kumagai,T.Fujimori,H.Kado,H.Miura: "New data on equalーloudness level contours for pure tones and threshold of hearing in a free field" Proc.of InterーNoise 90. 2. 1155-1158 (1990)

T.Sone,Y.Suzuki,H.Takeshima,M.Kumagai,T.Fujimori,H.Kado,H.Miura：“关于纯音和自由场听力阈值等响度轮廓的新数据”Proc . 内部噪声 90. 2. 1155-1158 (1990)

Y. Suzuki, T. Sone, H. Takesima, M. Kumagai, H. Miura: "On the re-examination of the equal-loudness level contours." Journal of Acoustical Society of Japan. Vol. 43. 420 (1990)

Y. Suzuki、T. Sone、H. Takesima、M. Kumagai、H. Miura：“关于等响度级别轮廓的重新检查”。

T.Sone: "A new data of equalーloudness level contours for pure tones and threshold of hearing in a free field." Proc.of InterーNoise 90. (1990)

T.Sone：“Inter-Noise 90 中纯音的等响度轮廓和听力阈值的新数据。”

T.Sone,Y,Suzuki,H.Takeshima M.Kumagai,T.Fujimori H.Kado,H.Miura: "New data on equalーloudness level contours for pure tones and threshold of hearing in a free field" Proc.of InterーNoise 90. 2. 1155-1158 (1990)

T.Sone,Y,Suzuki,H.Takeshima M.Kumagai,T.Fujimori H.Kado,H.Miura：“纯音等响度水平轮廓和自由场听力阈值的新数据”Proc.of Inter -噪音 90.2.1155-1158 (1990)