Speech intelligibility in class and alleviation of teachers' vocal abuse by sound field amplification in elementary schools

Kiyohiro Kurisu, Kimio Shiraishi, Ryoko Nakamura

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

Abstract

Speech Transmission Index (STI) is degraded by the actual ambient noise in class even though STI measured in empty classroom indicates excellent speech intelligibility. The more degraded intelligibility might be observed when teachers speak in normal voice. So they are forced to raise their voice and push them too hard to accomplish high speech intelligibility. In this report, STIs in empty classroom and in actual class are compared, and the estimation of speech intelligibility in class is estimated. Also, to reduce teachers' vocal abuse, sound reinforcement systems are installed in elementary school classrooms for sound field amplification. Vanishing their vocal abuse and maintaining the speech intelligibly, the sound systems are evaluated approvingly by the teachers.

Original languageEnglish
Title of host publication38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Pages4794-4802
Number of pages9
Publication statusPublished - Dec 1 2009
Event38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 - Ottawa, ON, Canada
Duration: Aug 23 2009Aug 26 2009

Publication series

Name38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Volume7

Other

Other38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
CountryCanada
CityOttawa, ON
Period8/23/098/26/09

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Kurisu, K., Shiraishi, K., & Nakamura, R. (2009). Speech intelligibility in class and alleviation of teachers' vocal abuse by sound field amplification in elementary schools. In 38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 (pp. 4794-4802). (38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009; Vol. 7).