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

Authors:Cuesta, María
Cobo, Pedro
Pfretzschner, Jaime
Fernández, Alejandro
Keywords:Sound absorption, Noise control, Active/Passive Techniques, Standing wave tube, Hybrid absorber, Frequency range
Issue Date:Apr-2004
Publisher:The 18th International Congress on Acoustics (ICA 2004)
Citation:18th International Congress on Acoustics, Engineering acoustics and electro-acoustics. 6. Active noise control, Tu4.E.2
Abstract:This 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.
Description:Communication presented at the 18th International Congress on Acoustics (ICA 2004): "Acoustical Science and Technology for Quality of Life", Kyoto, 4-9 April 2004.
URI:http://hdl.handle.net/10261/5994
Appears in Collections:(IA) Comunicaciones congresos

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