Loudness and timbre of broad-band noise mixed with frequency-modulated sounds
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概要
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A series of experiments was conducted concerning the loudness and timbre of broadband noise mixed with frequency-modulated sounds. The results suggested the followings: (1) FM sounds overlapped on broad-band noise can be just detectable when S/N is around zero (S: the level of FM sound, N: the 1/3 octave band level of broad-band noise with center frequency corresponding to carrier frequency of FM sound). (2) FM sounds overlapped on broad-band noise can be detected at S/N of -10 dB or less when it is interrupted. (3) The loudness of broad-band noise shows good correspondence with L__eq. However, when a prominent frequency component, such as FM sounds, is included, loudness level based on ISO 532B (LLz) shows better correspondence than L__eq. (4) The timbre becomes deteriorated when the level of specific frequency component increases or when its frequency becomes high. These effects were found even when the overall values of L__eq were kept constant. Neither L__eq nor LLz is sufficient for evaluating these effects. The methond for calculating sharpness proposed by von Bismarck is an appropriate method for evaluating the metallic aspect of the timbre.
- 社団法人日本音響学会の論文
著者
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Namba S
Osaka Univ.
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Kuwano S
Osaka Univ. Suita Jpn
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Kuwano Sonoko
College Of General Education Osaka University
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Namba Seiichiro
College of General Education,Osaka University
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Kinoshita Kanjiro
Daikin Industries Ltd.,
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Kurakata Kenji
Faculty of Human Sciences, Osaka University
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Kurakata K
National Inst. Biosci. And Human‐technol. Miti Tsukuba Jpn
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Kurakata K
National Institute Of Advanced Industrial Science And Technology Aist Tsukuba Central 6
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Kurakata Kenji
Faculty Of Human Sciences Osaka University
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Namba Seiichiro
College Of General Education Osaka University
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Kinoshita Kanjiro
Daikin Industries Ltd.
関連論文
- ISO/TC43・ISO/TC43/SC1・ISO/TC43/SC2総会 : 音響に関する国際規格の審議状況:2009ソウル会議
- ISO/TC43・ISO/TC43/SC1・ISO/TC43/SC2総会 : 音響に関する国際規格の審議状況:2008 Boras会議
- ISO/TC43・ISO/TC43/SC1・ISO/TC43/SC2総会 : 音響に関する国際規格の審議状況 : 2008 Boras 会議
- ISO/TC43・ISO/TC43/SC1・ISO/TC43/SC2総会 : 音響に関する国際規格の審議状況 : 2006 Madrid会議
- ISO/TC43・ISO/TC43/SC1・ISO/TC43/SC2総会 : 音響に関する国際規格の審議状況 : 2006 Madrid 会議
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- ISO/TC43・ISO/TC43/SC1・ISO/TC43/SC2総会 : 音響に関する国際規格の審議状況: 2005 Mississauga会議
- ISO/TC43・ISO/TC43/SC1・ISO/TC43/SC2総会 : 音響に関する国際規格の審議状況 : 2005 Mississauga 会議
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