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Title

Hybrid passive-active sound absorption in a standing wave tube using a thin plate actuator as secondary source

AuthorsCuesta, María; Cobo, Pedro; Pfretzschner, Jaime; Fernández, Alejandro
KeywordsSound absorption
Noise control
Active/Passive Techniques
Standing wave tube
Hybrid absorber
Frequency range
Issue DateApr-2004
PublisherInternational Congress on Acoustics
Citation18th International Congress on Acoustics, Engineering acoustics and electro-acoustics. 6. Active noise control, Tu4.E.2
AbstractThis paper deals with the design and optimization of a hybrid passive/active liner for broadband noise reduction in a standing wave tube. The thickness of the multilayer absorbent is reduced in two steps: firstly a porous layer backed by an air gap is substituted by a microperforated panel followed by a reduced air gap; and secondly, the secondary loudspeaker is replaced by a thin plate driven by a piezoceramic patch. Experimental results show that high absorption may be achieved in a wide frequency range (100-900 Hz) with a thin hybrid passive/active absorber.
DescriptionCommunication presented at the 18th International Congress on Acoustics (ICA 2004): "Acoustical Science and Technology for Quality of Life", Kyoto, 4-9 April 2004.
URIhttp://hdl.handle.net/10261/5994
Appears in Collections:(IA) Comunicaciones congresos
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