Spectro-temporal modulation transfer functions and speech intelligibility
Spectro-temporal modulation transfer functions and speech intelligibility
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DOI：
10.1121/1.428100
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发表时间：
1999-11-01
影响因子：
2.4
通讯作者：
Shamma, S
中科院分区：
文献类型：
--
作者：
Chi, TS;Gao, YJ;Shamma, S
使用宽带光谱在恒定速度下以正弦曲线波动的轮廓进行宽带光谱测量光谱和时间调制的检测阈值。光谱 - 周期调制传递函数（MTF）是作为波纹峰密度（Omega Cycles/octave）的函数得出的，并将速度漂流至（Omega HZ）。 MTF与两个维度表现出低通函数，其中50％的带宽约为16 Hz和2个周期/八度。数据复制LAS特殊情况）先前测量的纯颞MTF（Omega = 0）[Viemeister，J。Acoust。秒是。 66，1364-1380（1979）]和纯粹的光谱MTF（Omega = 0）[绿色，在听觉频率选择性（Plenum，Cambridge，1986），第351-359页]。提出了一个计算听觉模型，该模型表现出与数据中的显着趋势一致的光谱时代MTF。该模型用于证明这些MTF与在噪声和混响条件下评估语音清晰度的潜在相关性。 （c）1999美国声学学会。 [S0001-4966（99）02210-9]。
Detection thresholds for spectral and temporal modulations are measured using broadband spectra with sinusoidally rippled profiles that drift up or down the log-frequency axis at constant velocities. Spectre-temporal modulation transfer functions (MTFs) are derived as a function of ripple peak density (Omega cycles/octave) and drifting velocity to (omega Hz). The MTFs exhibit a low-pass function with respect: to both dimensions, with 50% bandwidths of about 16 Hz and 2 cycles/octave. The data replicate las special cases) previously measured purely temporal MTFs (Omega=0) [Viemeister, J. Acoust. Sec. Am. 66, 1364-1380 (1979)] and purely spectral MTFs (omega=0) [Green, in Auditory Frequency Selectivity (Plenum, Cambridge, 1986), pp. 351-359]. A computational auditory model is presented that exhibits spectre-temporal MTFs consistent with the salient trends in the data. The model is used to demonstrate the potential relevance of these MTFs to the assessment of speech intelligibility in noise and reverberant conditions. (C) 1999 Acoustical Society of America. [S0001-4966(99)02210-9].