Predicting Acoustics in Class Rooms

Claus Lynge Christensen, Jens Holger Rindel

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Typical class rooms have fairly simple geometries, even so room acoustics in this type of room is difficult to predict using today's room acoustic computer modeling software. The reasons why acoustics of class rooms are harder to predict than acoustics of complicated concert halls might be explained by some typical features of these rooms; parallel walls, low ceiling height (the rooms are flat) and very uneven distribution of absorption. It is suggested that a part of the explanation to the problem lies in the way scattering is implemented in current models relying on the use of scattering coefficients that are used in order to describe surface scattering (roughness of material) as well as scattering of reflected sound caused by limited surface size (diffraction). A method which combines scattering caused by diffraction due to surface dimensions, angle of incidence and incident path length with surface scattering is presented. Each of the two scattering effects is modeled as frequency dependent functions.
Original languageEnglish
Title of host publicationInterNoise 2005
Publication date2005
Publication statusPublished - 2005
Event34th International Congress and Exposition on Noise Control Engineering - Rio de Janeiro, Brazil
Duration: 7 Aug 200510 Aug 2005


Conference34th International Congress and Exposition on Noise Control Engineering
CityRio de Janeiro


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