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Article: Room noise filtering by shunted loudspeaker
Title | Room noise filtering by shunted loudspeaker |
---|---|
Authors | |
Keywords | Shunted Loudspeaker Electro-magnetic Coupling Room Noise Absorber |
Issue Date | 2014 |
Publisher | JTD Editorial Board. The Journal's web site is located at http://www.jtdweb.org/ |
Citation | Journal of Temporal Design, 2014, v. 12 n. 1, p. 13-24 How to Cite? |
Abstract | There are a variety of needs in room acoustics, such as the control of ventilation noise, adjustment of reverberation time and selective enhancement of echos over some frequency bands. All these call for a tunable sound absorber. This work describes an electro-acoustic method to design such an absorber, which is here described as an acoustic filter. The absorber consists of a moving-coil loudspeaker diaphragm backed by a cavity. When incident noise pushes the diaphragm, it moves and its structural damping consumes some sound energy. An RLC shunt circuit is attached to the moving coil giving an electrically induced mechanical impedance that alters the acoustic behaviour of the shunted loudspeaker. By manipulating component values of the shunt RLC circuit, the absorber drains noise at flexibly chosen frequency bands and at any assigned absorption levels, much like designing an electronic filter. The essential part of the theory is validated by experiment. |
Persistent Identifier | http://hdl.handle.net/10722/203021 |
ISSN |
DC Field | Value | Language |
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dc.contributor.author | Zhang, Y | en_US |
dc.contributor.author | Zhang, ZY | en_US |
dc.contributor.author | Huang, L | en_US |
dc.date.accessioned | 2014-09-19T11:08:06Z | - |
dc.date.available | 2014-09-19T11:08:06Z | - |
dc.date.issued | 2014 | en_US |
dc.identifier.citation | Journal of Temporal Design, 2014, v. 12 n. 1, p. 13-24 | en_US |
dc.identifier.issn | 1346-7824 | - |
dc.identifier.uri | http://hdl.handle.net/10722/203021 | - |
dc.description.abstract | There are a variety of needs in room acoustics, such as the control of ventilation noise, adjustment of reverberation time and selective enhancement of echos over some frequency bands. All these call for a tunable sound absorber. This work describes an electro-acoustic method to design such an absorber, which is here described as an acoustic filter. The absorber consists of a moving-coil loudspeaker diaphragm backed by a cavity. When incident noise pushes the diaphragm, it moves and its structural damping consumes some sound energy. An RLC shunt circuit is attached to the moving coil giving an electrically induced mechanical impedance that alters the acoustic behaviour of the shunted loudspeaker. By manipulating component values of the shunt RLC circuit, the absorber drains noise at flexibly chosen frequency bands and at any assigned absorption levels, much like designing an electronic filter. The essential part of the theory is validated by experiment. | - |
dc.language | eng | en_US |
dc.publisher | JTD Editorial Board. The Journal's web site is located at http://www.jtdweb.org/ | - |
dc.relation.ispartof | Journal of Temporal Design | en_US |
dc.subject | Shunted Loudspeaker | - |
dc.subject | Electro-magnetic Coupling | - |
dc.subject | Room Noise Absorber | - |
dc.title | Room noise filtering by shunted loudspeaker | en_US |
dc.type | Article | en_US |
dc.identifier.email | Zhang, Y: yumin@hku.hk | en_US |
dc.identifier.email | Huang, L: lixi@hku.hk | en_US |
dc.identifier.authority | Huang, L=rp00119 | en_US |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.hkuros | 236530 | en_US |
dc.identifier.volume | 12 | en_US |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 13 | en_US |
dc.identifier.epage | 24 | en_US |
dc.publisher.place | Japan | - |
dc.identifier.issnl | 1346-7824 | - |