JP5032880B2 - 音環境評価方法 - Google Patents
音環境評価方法 Download PDFInfo
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- JP5032880B2 JP5032880B2 JP2007108736A JP2007108736A JP5032880B2 JP 5032880 B2 JP5032880 B2 JP 5032880B2 JP 2007108736 A JP2007108736 A JP 2007108736A JP 2007108736 A JP2007108736 A JP 2007108736A JP 5032880 B2 JP5032880 B2 JP 5032880B2
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Description
・ カットオフ周波数2400Hz(−48dB/oct.)の低域通過フィルタと、
・ Schroederによって考案されたModulated Noise Reference Unit(以下「MNRU」という)処理(M.R.Schroeder,J Acoust Soc Am.44,1735−36,1968.)
の二種類を用いた。MNRU処理は、元の信号と、符号(±)をランダムに変化させた信号とを足し合わせるもので、S/N比は−6dBとした。
Claims (1)
- 語音からなっていて、冗長性を有し、残響のない音環境において了解可能であると共に、評価しようとする特定の音環境において了解可能で、残響のない音環境であるか、前記特定の音環境であるかによって、了解度に差異を確認することのできないものを、基準音とし、
該基準音に対しその冗長性を減じる特定の劣化処理が施された劣化処理音を用い、前記特定の音環境における該劣化処理音の了解度と、残響のない音環境における劣化処理音の了解度とを求め、
前記特定の音環境における該劣化処理音の了解度が、残響のない音環境における該劣化処理音の了解度よりも低下したのを確認したとき、前記特定の音環境を、前記劣化処理音に残存していた冗長度を減じる性質をもった音環境である、と評価することを特徴とする音環境評価方法。
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JP2007108736A JP5032880B2 (ja) | 2007-04-17 | 2007-04-17 | 音環境評価方法 |
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JP2007108736A JP5032880B2 (ja) | 2007-04-17 | 2007-04-17 | 音環境評価方法 |
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JP2008268383A JP2008268383A (ja) | 2008-11-06 |
JP5032880B2 true JP5032880B2 (ja) | 2012-09-26 |
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