Measurement and prediction of voice support and room gain in school classrooms

David Pelegrin-Garcia, Jonas Brunskog, Viveka Lyberg-Åhlander, Anders Löfqvist

Research output: Contribution to journalArticlepeer-review

27 Citations (SciVal)

Abstract

Objective acoustic parameters have been measured in 30 school classrooms. These parameters include usual descriptors of the acoustic quality from the listeners’ standpoint, such as reverberation time, speech transmission index, and background noise level, and two descriptors of the acoustic properties for a speaker: Voice support and room gain. This paper describes the measurement method for these two parameters and presents a prediction model for voice support and room gain derived from the diffuse field theory. The voice support for medium-sized classrooms with volumes between 100 and 250 m3 and good acoustical quality lies in the range between _14 and _9 dB, whereas the room gain is in the range between 0.2 and 0.5 dB. The prediction model for voice support describes the measurements in the classrooms with a coefficient of determination of 0.84 and a standard deviation of 1.2 dB.
Original languageEnglish
Pages (from-to)194-204
JournalJournal of the Acoustical Society of America
Volume131
Issue number1
DOIs
Publication statusPublished - 2012

Subject classification (UKÄ)

  • Other Medical Sciences not elsewhere specified
  • Otorhinolaryngology

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