Title: Four-microphone-array measurements combined with geometrical room acoustic simulation technique
Abstract: For a revision of the acoustics of enclosures it is important to analyze the existing acoustical mechanisms. Therefore, measurement of room impulse response functions is a usual standard. The temporal progression of the incident sound can be determined from these impulse responses. Single number quantities can be evaluated, too. However, the knowledge of the direction of the first reflection is also of prime importance. Computer simulation of the room acoustic is a powerful tool to evaluate these directions but it is only reasonable if the geometry of the room is well known. Often it is difficult to get detailed information of the geometry, especially if there are curved walls. This paper focuses on the evaluation of spatial information of sound fields with a four-microphone-array measurement system and the post-processing with algorithms taken from geometrical room acoustic simulation. With multidimensional sound field analysis it is possible to get the direction of the important reflections. Virtual sound sources can be calculated. With a back tracing algorithm the history of higher-order reflections can be determined or the geometry of the room model and the results of computer simulation can be verified by a comparison of measured and calculated VSS.
Publication Year: 1999
Publication Date: 1999-02-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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