On the development of a frequency-lowering system that enhances place-of-articulation perception.
On the development of a frequency-lowering system that enhances place-of-articulation perception.
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DOI：
10.1016/j.specom.2011.07.008
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发表时间：
2012-01-01
影响因子：
3.2
通讯作者：
Mullangi, Ala
中科院分区：
文献类型：
--
作者：
Kong, Ying-Yee;Mullangi, Ala
频率降低是一种信号处理形式，旨在将高频语音提示传递到高频听力损失的听者的剩余听力区域。虽然这种处理技术已经被证明可以改善摩擦辅音和塞音辅音的可理解性，但对于听力受损的听者来说，对发音位置的感知仍然是一个挑战，特别是当语音信号的带宽在降频处理期间被降低时。本文描述了一种改进的基于声码器的降频系统，其目的是通过增强摩擦辅音的频谱差异来改善发音位置感知。在该系统中，频率降低是有条件的；只要语音信号的高频部分(>；400赫兹)是周期信号，它就抑制处理。此外，该系统还根据摩擦辅音的频谱信息(斜率和峰值位置)将非共鸣辅音分为三类。与低通滤波和波森等人的S系统相比，使用我们改进的系统的一组听力正常的听者的结果显示，对发音和发音特征的感知以及发音位置的区分都有所改善，而对鼻音和半元音的感知没有降低。
Frequency lowering is a form of signal processing designed to deliver high-frequency speech cues to the residual hearing region of a listener with a high-frequency hearing loss. While this processing technique has been shown to improve the intelligibility of fricative and affricate consonants, perception of place of articulation has remained a challenge for hearing-impaired listeners, especially when the bandwidth of the speech signal is reduced during the frequency-lowering processing. This paper describes a modified vocoder-based frequency-lowering system similar to one reported by, with the goal of improving place-of-articulation perception by enhancing the spectral differences of fricative consonants. In this system, frequency lowering is conditional; it suppresses the processing whenever the high-frequency portion (>400 Hz) of the speech signal is a periodic signal. In addition, the system separates non-sonorant consonants into three classes based on the spectral information (slope and peak location) of fricative consonants. Results from a group of normal-hearing listeners with our modified system show improved perception of frication and affrication features, as well as place-of-articulation distinction, without degrading the perception of nasals and semivowels compared to low-pass filtering and Posen et al.’s system.
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影响因子：
2.4
作者：
BEHRENS, S;BLUMSTEIN, SE
通讯作者：
BLUMSTEIN, SE
影响因子：
2.7
作者：
Fuellgrabe, Christian;Baer, Thomas;Moore, Brian C. J.
通讯作者：
Moore, Brian C. J.
影响因子：
2.4
作者：
Dudley, H
通讯作者：
Dudley, H
影响因子：
2.4
作者：
MILLER, GA;NICELY, PE
通讯作者：
NICELY, PE
DOI：
10.1044/1092-4388(2010/10-0197
发表时间：
2011-06-01
影响因子：
2.6
作者：
Kong, Ying-Yee;Braida, Louis D.
通讯作者：
Braida, Louis D.