In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 117, No. 4_Supplement ( 2005-04-01), p. 2528-2528
Abstract:
This paper studies how the sound distribution of room or cavity is affected by the absorptive materials arrangement on the wall. In other words, we want to know, very specifically, how the change of boundary condition affects rooms sound distribution. The boundary condition can be modified by changing not only absorbents position but also its acoustic impedance. The effect of changing boundary condition is expressed in terms of modal admittance on the enclosures surface. What we have gotten from this study is that the absorptive materials placement is closely related to wave length, cavity size and geometry. The authors pay attention to the intensity field, especially reactive intensity divergence in space. The divergence of reactive component of intensity is directly related to acoustic energy distribution which is composed of potential and kinetic energy. Using acoustic energy balance equation, the relation between global noise control performance and absorptive material arrangement is explained. In this point of view, the possibility of global noise reduction will be discussed in terms of acoustic potential energy reduction.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2005
detail.hit.zdb_id:
1461063-2
Permalink
