Reducing seat dip attenuation

Davies, WJ; Cox, TJ

Abstract

Strategies fur reducing seat dip attenuation in concert halls are considered. It is shown that the dip is established 4 ms after the direct sound from the stage arrives at the listener. Sound scattered from the seats and floor is the main cause of the dip. By controlling these very early reflections the attenuation can be reduced to below its subjective threshold. With this in mind, changes to the shape and impedance of the seats and floor are trialed using a boundary element model and a physical scale model. It is found that the seat dip effect can be rendered inaudible by introducing a l-m pit under the seats. Smaller improvements are produced by changing the impedance of the seat squab. (C) 2000 Acoustical Society of America.

Citation

Davies, W., & Cox, T. (2000). Reducing seat dip attenuation. ˜The œJournal of the Acoustical Society of America (Online), 108(5), 2211-2218

• Journal Article Type: Article
• Publication Date: Jan 1, 2000
• Deposit Date: Jul 13, 2012
• Publicly Available Date: Apr 5, 2016
• Journal: The Journal of the Acoustical Society of America (JASA)
• Print ISSN: 0001-4966
• Peer Reviewed: Peer Reviewed
• Volume: 108
• Issue: 5
• Pages: 2211-2218
• Keywords: sound fields
• Publisher URL: http://asadl.org/jasa/resource/1/jasman/v108/i5/p2211_s1
• Additional Information: Additional Information : 1 372GR J ACOUST SOC AMER