Moore B C, Peters R W, Glasberg B R
Department of Experimental Psychology, University of Cambridge, England.
J Acoust Soc Am. 1990 Jul;88(1):132-40. doi: 10.1121/1.399960.
Auditory-filter shapes were estimated in normally hearing subjects for signal frequencies (fs) of 100, 200, 400, and 800 Hz using the notched-noise method [R. D. Patterson and I. Nimmo-Smith, J. Acoust. Soc. Am. 67, 229-245 (1980)]. Two noise bands, each 0.4fs wide, were used; they were placed both symmetrically and asymmetrically about the signal frequency to allow the measurement of filter shape and asymmetry. Two overall noise levels were used: 77 and 87 dB SPL. In deriving the shapes of the auditory filters, account was taken of the nonflat frequency response of the Sennheiser HD424 earphone, and also of the frequency-dependent attenuation produced by the middle ear. The auditory filters were asymmetric; the upper skirt was steeper than the lower skirt. The asymmetry tended to be greater at the higher noise level. The equivalent rectangular bandwidths (ERBs) of the filters at the lower noise level had average values of 36, 47, 87, and 147 Hz for values of fs of 100, 200, 400, and 800 Hz, respectively. The standard deviations of the ERBs across subjects were typically about 10% of the ERB values. The signal-to-masker ratio at the output of the auditory filter required to achieve threshold increased markedly with decreasing fs.
使用带凹口噪声法[R. D. 帕特森和I. 尼莫-史密斯，《美国声学学会杂志》67, 229 - 245 (1980)]，在听力正常的受试者中估计了100、200、400和800赫兹信号频率（fs）下的听觉滤波器形状。使用了两个噪声带，每个噪声带宽0.4fs；它们围绕信号频率对称和不对称放置，以测量滤波器形状和不对称性。使用了两个总体噪声水平：77和87分贝声压级。在推导听觉滤波器的形状时，考虑了森海塞尔HD424耳机的非平坦频率响应，以及中耳产生的频率依赖性衰减。听觉滤波器是不对称的；上裙边比下裙边更陡。在较高噪声水平下，不对称性往往更大。在较低噪声水平下，滤波器的等效矩形带宽（ERB）对于100、200、400和800赫兹的fs值分别具有36、47、87和147赫兹的平均值。受试者之间ERB的标准偏差通常约为ERB值的10%。达到阈值所需的听觉滤波器输出端的信号掩蔽比随着fs的降低而显著增加。
