Wavelet packet based analysis of sound fields in rooms using coincident microphone arrays
Applied Acoustics, ISSN: 0003-682X, Vol: 68, Issue: 7, Page: 778-796
2007
- 14Citations
- 24Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
This paper presents a passive analysis method for determining the spatio-temporal characteristics of sound fields in small rooms. The analysis finds an approximate directional reflectogram (ADR) which reveals the approximate arrival directions, time delays and amplitudes of the direct sound and early reflections without using a special or known sound source. A coincident microphone array is used to obtain directional recordings. The recordings are analysed by wavelet packet decomposition to determine the direction of the sound source and select wavelet packet coefficients to reconstruct the estimate of the direct sound. ADR is then computed via deconvolution using this estimate. Experiments have been carried out using synthesized recordings that were obtained from actual room impulse responses measured in two rooms for various source locations. The method estimates the source direction with a mean absolute error of about 7°. Calculated ADRs provide a good estimate of the time delays and arrival directions of acoustical reflections, whereas the amplitudes differ slightly.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0003682X06000752; http://dx.doi.org/10.1016/j.apacoust.2006.04.008; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34047126017&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0003682X06000752; https://api.elsevier.com/content/article/PII:S0003682X06000752?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S0003682X06000752?httpAccept=text/plain; https://dx.doi.org/10.1016/j.apacoust.2006.04.008
Elsevier BV
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