Syllabic (∼2-5 Hz) and fluctuation (∼1-10 Hz) ranges in speech and auditory processing.

Syllabic (∼2-5 Hz) and fluctuation (∼1-10 Hz) ranges in speech and auditory processing.
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DOI:
10.1016/j.heares.2013.08.017
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发表时间:
2013-11
期刊:
影响因子:
2.8
通讯作者:
Chang, Edward F.
Chang, Edward F.
中科院分区:
医学1区
文献类型:
--
作者:
Edwards, Erik;Chang, Edward F.

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鉴于最近的兴趣音节率(~2-5 Hz)的语音处理,我们审查的感知“波动”范围(~1-10 Hz)的调制在听语音和技术听觉刺激(AM和FM音调和噪声,和涟漪的声音)。我们发现人类听觉感知的时间调制传递函数(TMTF)在本质上不是简单的低通,而是在音节范围(~2-5 Hz)内表现出灵敏度的峰值。我们还解决人类和动物的神经生理学证据,并认为,这种带通调谐出现在丘脑皮层水平,是更多的相关非主要地区比主要地区的皮质。带通而不是低通TMTF对听觉中枢生理学和语音处理建模有影响:这涉及时间对比度而不是简单的时间整合,在波动范围内动态刺激的对比度增强。
Given recent interest in syllabic rates (~2-5 Hz) for speech processing, we review the perception of “fluctuation” range (~1-10 Hz) modulations during listening to speech and technical auditory stimuli (AM and FM tones and noises, and ripple sounds). We find evidence that the temporal modulation transfer function (TMTF) of human auditory perception is not simply low-pass in nature, but rather exhibits a peak in sensitivity in the syllabic range (~2-5 Hz). We also address human and animal neurophysiological evidence, and argue that this bandpass tuning arises at the thalamocortical level and is more associated with non-primary regions than primary regions of cortex. The bandpass rather than low-pass TMTF has implications for modeling auditory central physiology and speech processing: this implicates temporal contrast rather than simple temporal integration, with contrast enhancement for dynamic stimuli in the fluctuation range.
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