The effect of amplitude envelope blending across frequency bands on the quality of noise-vocoded speech

Kazuo Ueda, Tomoya Araki, Yoshitaka Nakajima

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Ueda and Nakajima [Trans. Tech. Comm. Psychol. Physiol. Acoust., 38, 771-776, (2008); 39, 211-216, (2009)] found a consistent clustering of frequency bands common to different languages through factor analyses applied to power fluctuations of critical-band filtered speech sounds. One of the factors exhibited a characteristic shape of two peaks, which implied a correlation between a pair of distant frequency bands. The present study examined how amplitude envelope independence across frequency bands affected perception of Japanese noise-vocoded speech. The results indicated that the 20- and 4-band-synthesis conditions exhibited nearly perfect performances without any systematic training or feedback, and that the conditions in which the lowest and the next lowest frequency band blended, keeping a long-term spectrum energy distribution (sharpness) constant, yielded low mora accuracy. Those results indicated that noise-vocoded speech synthesized with the 4 frequency bands contained enough information for speech perception.

    Original languageEnglish
    Title of host publication8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
    EditionPART 3
    Publication statusPublished - 2009
    Event8th European Conference on Noise Control 2009, EURONOISE 2009 - Edinburgh, United Kingdom
    Duration: Oct 26 2009Oct 28 2009

    Publication series

    Name8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
    NumberPART 3
    Volume31

    Other

    Other8th European Conference on Noise Control 2009, EURONOISE 2009
    Country/TerritoryUnited Kingdom
    CityEdinburgh
    Period10/26/0910/28/09

    All Science Journal Classification (ASJC) codes

    • Acoustics and Ultrasonics

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