Mechanical study of a plane wave transducer for active noise control
2007 (English)In: Turkish Acoustical Society - 36th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2007 ISTANBUL, 2007, 1608-1617 p.Conference paper (Refereed)
An electrostatic transducer is created by attaching a metallized diaphragm between two porous stator layers. A loudspeaker element constructed this way exhibits a dipole radiation pattern due to its symmetric structure. When the transducer dimensions are large compared to wavelength of the produced sound, the sound field exhibits minimal spatial spreading. When the movement of a radiating surface is in same phase over the whole area, plane waves are produced. The discussed electrostatic transducer exhibits excellent impulse and phase response characteristics, which makes it highly suitable for active noise control. The accuracy of the response is affected by the mechanical behavior of the whole structure. To study the movement of the stators and the diaphragm, laser scanner measurements and simulations were performed. The movement of the stators was noted to play a significant role in the sound creation in addition to the diaphragm movement.
Place, publisher, year, edition, pages
2007. 1608-1617 p.
Acoustic fields, Diaphragms, Elastic waves, Electrostatics, Exhibitions, Stators, Transducers, Wave propagation
IdentifiersURN: urn:nbn:se:kth:diva-83391ScopusID: 2-s2.0-84873970545ISBN: 978-160560385-8OAI: oai:DiVA.org:kth-83391DiVA: diva2:498794
36th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2007; Istanbul; Turkey; 28 August 2007 through 31 August 2007
QC 201202292012-02-122012-02-122016-09-29Bibliographically approved