An experimental investigation is reported into the effects of a porous layer on the radiated sound intensity from distributed mode loudspeakers (DMLs). For an unbaffled panel, the results suggest that attaching an absorbent layer behind the panel leads to a smoothing of the spectra of sound intensity. When a specially developed enclosure was used, an improvement in the low frequency response of DML panel was observed. The inclusion of a porous layer in this enclosure further reduced the fluctuations of the emitted sound spectra, and smoothed the resonance peaks in the low frequency range.

Authors: Prokofieva, Elena; Horoshenkov, Kirill V.; Harris, Neil
Affiliations: University of Bradford, Department of Civil Engineering, Bradford, UK ; New Transducers Limited, Huntingdon, UK(See document for exact affiliation information.)
AES Convention: 112 (April 2002) Paper Number: 5609
Publication Date: April 1, 2002
Subject: Seminar: Loudspeaker Arrays

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