Precision Measurements of Equal-loudness Level Contours

等响度等值线的精密测量

• 批准号: 03555089
• 负责人: KUMAGAI Masazumi
• 金额: $ 1.86万
• 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 Developmental Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03555089/
• 关键词: loudness; equal-loudness level contour; threshold of hearing; head transfer function; psychophysical method; constant method

The purpose of this research is to get Japanese fundamental hearing data for renewal work of international standard ISO 226 (Acoustics - Normal equal-loudness level contours). Two kinds of laboratory work were carried out throughout these two years.(1) Effect of the sound field difference between free field and diffuse fieldThe frequency characteristics of 40 phon equal-loudness level, threshold of hearing and head transfer function were measured both in free field (in anechoic room) and in diffuse field (in reverberation room). The frequency range was 250 Hz to 2 kHz.Comparing the level differences of these characteristics obtained in both fields, following results were obtained;(a) the shape of level difference of 40 phon equal-loudness level and threshold of hearing are similar to that of head transfer function,(b) the values of the level difference of threshold of hearing are 3 to 5 dB lower than that of head transfer function.(c) frequency dip in 800 Hz is found newly in these three characteristics, while there was no dip in ISO 226.(2) Reexamination the error of constant methodThe points of subjective equality (PSE) using constant method are affect-ed by the experimental condition. Following knowledge are obtained;(a) the dispersion of PSE from 5 trials in same conditions is about 3 dB, this value is almost same as the level step of test stimuli,(b) PSE are influenced by the center level of test stimuli, and the responses of subjects are deviated to center level.

本研究的目的是为国际标准ISO 226（声学-正常等响水平等值线）的更新工作获得日本人的基本听力数据。在这两年中进行了两种实验室工作。(1)自由场与扩散场声场差异的影响在无回声室和混响室中分别测量了40个音素的等响级频率特性、听阈和头部传递函数。频率范围为250 Hz ~ 2 kHz，比较两种场所测得的这些特性的级差，结果表明：（1）40声等响级和听阈的级差形状与头部传递函数相似，（B）听阈级差值比头部传递函数值低3 ~ 5 dB。(c)在这三个特性中新发现了800 Hz的频率下降，而在ISO 226中没有下降。(2)常量法误差的再检验常量法主观等效点（PSE）受实验条件的影响。获得以下知识;（a）相同条件下5次试验的PSE离散度约为3 dB，该值与测试刺激的水平阶跃几乎相同，（B）PSE受测试刺激中心水平的影响，被试者的反应偏离中心水平。

项目成果

H.Takeshima, M.Kumagai, T.Fujimori, K.Ozawa, Y.Suzuki and T.Sone: "Difference of equal-loudness level or threshold of hearing between under free-field and diffuse-field listening conditions." Proc. of Acoustical Society of Japan. 333 (1993)

H.Takeshima、M.Kumagai、T.Fujimori、K.Ozawa、Y.Suzuki 和 T.Sone：“自由场和扩散场聆听条件下等响度水平或听力阈值的差异。”

竹島 久志,熊谷 正純,藤森 威,小澤 賢司,鈴木 陽一,曽根 敏夫: "自由音場と拡散音場における等ラウドネスレベルおよび最小可聴値の差" 日本音響学会研究論文集平成5年3月. 333-334 (1993)

Hisashi Takeshima、Masazumi Kumagai、Takeshi Fujimori、Kenji Ozawa、Yoichi Suzuki、Toshio Sone：“自由声场和扩散声场中等响度水平与最小可听值之间的差异”日本声学学会杂志，1993 年 3 月。 333 -334（ 1993）

T.SONE,Y.SUZUKI,H.TAKESHIMA,H.KUMAGAI,T.FUJIMORI,H.MIURA: "Further consideration on the threshold of hearing and the egual-loudness level contours for pure tohe in afree field" Proceedings of Inter-Noise 91. 1. 61-64 (1991)

T.SONE、Y.SUZUKI、H.TAKESHIMA、H.Kumagai、T.FUJIMORI、H.MIURA：“进一步考虑听力阈值和自由场中纯 tohe 的等响度水平轮廓”国际会议论文集

竹島 久志,熊谷 正純,藤森 威,小澤 賢司,鈴木 陽一,曽根 敏夫: "自由音場と拡散音場における等ラウドネスレベルおよび最小可聴値の差" 日本音響学会講演論文集平成5年3月. (1993)

Hisashi Takeshima、Masazumi Kumagai、Takeshi Fujimori、Kenji Ozawa、Yoichi Suzuki、Toshio Sone：“自由声场和扩散声场中相等响度水平和最小可听值之间的差异”日本声学学会会议记录，1993 年 3 月。（1993 年） ）

T.Sone,Y.Suzuki,H.Takeshima,M.Kumagai,T.Fujimori,H.Miura: "Further consideration on the threshold of hearing and the egual-loudness level contours for pure tone in a free field" Proceedings of Inter-Noise 91. 1. 61-64 (1991)

T.Sone、Y.Suzuki、H.Takeshima、M.Kumagai、T.Fujimori、H.Miura：“进一步考虑自由场中纯音的听力阈值和等响度水平轮廓”Interceedings of Inter