Checkerboard speech vs interrupted speech: Effects of spectrotemporal segmentation on intelligibility

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  • Ueda, Kazuo
    Department of Human Science, Faculty of Design, Kyusyu University Research Center for Applied Perceptual Science, Kyushu University Research and Development Center for Five-Sense Devices, Kyusyu University
  • Kawakami, Riina
    Department of Acoustic Design, Kyushu University
  • Takeichi, Hiroshige
    Computational Engineering Applications Unit, R&D, ISC, RIKEN

Abstract

The intelligibility of interrupted speech (interrupted over time) and checkerboard speech (interrupted over time-by-frequency), both of which retained a half of the original speech, was examined. The intelligibility of interrupted speech stimuli decreased as segment duration increased. 20-band checkerboard speech stimuli brought nearly 100% intelligibility irrespective of segment duration, whereas, with 2 and 4 frequency bands, a trough of 35%–40% appeared at the 160-ms segment duration. Mosaic speech stimuli (power was averaged over a time-frequency unit) yielded generally poor intelligibility (≦10% ). The results revealed the limitations of underlying auditory organization for speech cues scattered in a time-frequency domain.

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Journal

  • JASA Express Letters

    JASA Express Letters 1 (7), 075204-1-075204-7, 2021-07-21

    Acoustical Society of America

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