Evaluation of acoustic environments using deteriorated speech sound.

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Evaluation of acoustic environments using deteriorated speech sound. Abstract Text:

Aged or hearing-impaired people require better acoustical environments for higher QOL. Many methods of evaluating the quality of speech in acoustical environments have been developed. However, since they mainly focus on quality of speech in bad conditions (e.g. environments with huge noise or long reverberation), they are not suited for evaluations in generic environments such as normal houses or public facilities for aged people. For instance, the scores of D value (deutlichkeit) or speech transmission index (STI) are too high and not sensitive enough to refer to such environments. The intelligibility test using normal speech sounds cannot clarify the differences between different room environments because the intelligibility scores reach almost 100 percent in ordinary room environments. Therefore, we proposed a new evaluation method using deteriorated speech sounds. In this method, signal-processed speech sounds are presented to trial subjects under target sound environments. In this study, Japanese monosyllabic speech sounds convoluted by the impulse responses of room reverberations were presented through a headphone in order to simulate the architectural acoustic environments. As a result, it was shown that this new method could detect the small difference of sound environments, which the conventional methods could hardly evaluate.

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Evaluation of acoustic environments using deteriorated speech sound. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of the Acoustical Society of America

VOLUME: 123

Page Numbers: 3176

Journal Abbreviation: J. Acoust. Soc. Am.

ISSN: 1520-8524

DAY: 5

MONTH: May

YEAR: 2008

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LANGUAGE: eng

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AFFILIATION: Nara Medical University, 840 Shijo-cho, 634-8522 Kashihara, Japan, naramed-u@nagatani.ne.jp.

Country: United States

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MEDLINETA: J Acoust Soc Am

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