| Active modal control for sound field in a room |
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| 引用本文： | TIAN Jing(Institute of Acoustics,Academia Sinica,Beijing 100080). Active modal control for sound field in a room[J]. 声学学报：英文版, 1996, 0(4) |
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| 作者姓名： | TIAN Jing(Institute of Acoustics Academia Sinica Beijing 100080) |
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| 作者单位： | Institute of Acoustics，Academia Sinica，Beijing 100080 |
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| 摘 要： | I.IntroductionInlate198()'s,thestudiesonactivenoisecontrolhavebeengraduallyturnedfromtheductsandopenspacestothemorepracticaIenclosedsoundfields.SomespeciaIworkinaccordancewiththeactiveattenuationofcabinnoisehasstartedwiththeoreticalmechanisms,systemdesignandtransducerdevelopmellt.Intensivereflectionsandtheformedstandingwavedistributioni11al1enclosedsoundfieldarealwaysthemaindifficultiesforactivenoisecontrolinthesecases.Ontheotherhand,normalmoderesponseofthefieldalsoimplementsanewmethod,theap…
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Active modal control for sound field in a room |
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| TIAN Jing. Active modal control for sound field in a room[J]. Chinese Journal of Acoustics, 1996, 0(4) |
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| Authors: | TIAN Jing |
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| Abstract: | When the concept of active modal control is applied to sound field control in en-closures, effective sampling and reuconstruction of the spatial field are the main problems that have to be solved theoretically. It is even more important to realize a stable and controllable feedback control system in experiment. In this paper, a conceptual theoretical analysis for ac-tive modal control in an enclosed sound field is given. Vaious methods are used to compensate the potential unstable poles of the applied system. A series of experimental results are obtained and discussed, by which some of the natures of active modal control systems are delineated. |
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| Keywords: | sound field enclosure normal mode active control |
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