| Optimal design of panel speaker array with omnidirectional characteristics. | |
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MedLine Citation:
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PMID: 12430806 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A panel speaker system intended for a projection screen is developed. Like other sound sources with large dimension, the panel speaker has a beaming problem in high frequencies. To alleviate the problem, panel speakers are integrated into an array, with optimal electronic compensation for omnidirectional response and array efficiency. The heart of the design procedure is a three-stage optimization scheme involving two nonlinear and nonconvex objectives. The process is interactive, allowing the array coefficients to be tailored so that the specifications of directional response can be met. The optimal design of panel speaker array is then implemented by using a multichannel digital signal processor. In addition, a Hilbert transformer is required to produce the quadrature components of the array coefficients. A small array and a large matrix were constructed to validate the implemented array signal processing system. The experimental results indicate that, without degradation of efficiency, the proposed optimization technique in conjunction with electronic compensation is effective in attaining omnidirectional radiation property. |
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Authors:
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Mingsian R Bai; Kuochan Chung |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 112 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2002 Nov |
Date Detail:
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Created Date: 2002-11-14 Completed Date: 2002-12-10 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 1944-52 Citation Subset: IM |
Affiliation:
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msbai@cc.nctu.edu.tw |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Amplifiers, Electronic Equipment Design Humans Models, Theoretical* Signal Processing, Computer-Assisted* Speech* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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