| Active sound control by directional sources in the free field |
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| 引用本文： | HOU Hong, WANG Chong,YANG Jianhua and SUN Jincai(Institute of acoustic engineering. Northwestern Polytechnical University. Xi'an 710072). Active sound control by directional sources in the free field[J]. 声学学报：英文版, 1995, 0(4) |
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| 作者姓名： | HOU Hong WANG Chong YANG Jianhua and SUN Jincai(Institute of acoustic engineering. Northwestern Polytechnical University. Xi'an 710072) |
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| 摘 要： | TheprojectissupportedbyAeronauticalScienceFoundation.I.IntroductionThecontro1ofsoundfieldbyintroducingacousticsourcesisatopicofnoisecontrolinwhichanincrcasinginterestisbeingshown.Gcnerallytherearemain1ytwoaspectsinthere-searchesonActiveNoiseContro1(ANC)--theoriesofactivesoundattenuationwhichisthebasementofthetCchnique,anddesignofthecontrolsystem.Recent1y,anewtheorywhichisconsideredtohewc11suitcdtotheanalysisofpracticalproblemshasbeenpresentedbyP.A.Nc1sonetal.[ll.Itshowsthattheminimumpowe…
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Active sound control by directional sources in the free field |
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| HOU Hong, WANG Chong,YANG Jianhua and SUN Jincai. Active sound control by directional sources in the free field[J]. Chinese Journal of Acoustics, 1995, 0(4) |
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| Authors: | HOU Hong WANG Chong YANG Jianhua SUN Jincai |
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| Affiliation: | Institute of acoustic engineering. Northwestern Polytechnical University. Xi'an 710072 |
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| Abstract: | In this paper, a general formula for calculating the complex strengths of secondary sources is derived from the minimization criterion of total acoustic power output when both of the primary and secondary sources are directional. Then specific properties of active sound attenuation are presented for some commonly used typical directional sources and the rule for distributing directional secondary sources is given. |
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| Keywords: | Directivity Complex strength Radiation power |
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