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Journal Article

On the Acoustic Radiation from a Loudspeaker's Cabinet

Authors: Bastyr, Kevin J.; Capone, Dean E.

Journal of the Audio Engineering Society · Volume 51 · Issue 4 · pp. 234–243 · April 2003

Abstract

A scanning laser Doppler vibrometer and a computational boundary-element model are used to study the acoustic radiation from loudspeaker cabinets. In contrast to the research findings of Skrodzka, loudspeaker cabinets are shown to contribute significantly to the total radiated pressure at their lower resonance frequencies. This occurs because, despite a cabinet's relatively small surface velocity, its radiation efficiency is many times greater than that of the drivers. The radiation from two different versions of NHT's model 2.9 loudspeaker is investigated. The first is a standard production 2.9, the second a 2.9 without the standard internal bracing. A comparison of their performance yields insight into the effects of wall bracing location: stiffer cabinets with lower amplitude wall vibrations do not always radiate less sound.

Details

Publication
Journal of the Audio Engineering Society
Volume
51
Issue
4
Pages
234–243
Publication date
April 6, 2003
Affiliation
Graduate Program in Acoustics, The Pennsylvania State University, State College, PA ; Applied Research Laboratory, The Pennsylvania State University, State College, PA (See document for exact affiliation information.)
Type
Journal Article