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

D Pelegrin-Garcia, J Brunskog, Viveka Lyberg Åhlander, A Lofqvist

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

21 Citeringar (Scopus)

Sammanfattning

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 m(3) 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. (C) 2012 Acoustical Society of America. [DOI: 10.1121/1.3665987]
OriginalspråkOdefinierat/okänt
Sidor (från-till)194–204
Antal sidor11
TidskriftJournal of the Acoustical Society of America
Volym131
DOI
StatusPublicerad - 2012
MoE-publikationstypA1 Tidskriftsartikel-refererad

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