0

Full Content is available to subscribers

Subscribe/Learn More  >

Noise Control in a Small Enclosure Using T-Shaped Acoustic Resonators

[+] Author Affiliations
Deyu Li, Li Cheng

Hong Kong Polytechnic University, Hong Kong, China

Jeffery S. Vipperman

University of Pittsburgh, Pittsburgh, PA

Paper No. NCAD2008-73034, pp. 207-214; 8 pages
doi:10.1115/NCAD2008-73034
From:
  • ASME 2008 Noise Control and Acoustics Division Conference
  • ASME 2008 Noise Control and Acoustics Division Conference
  • Dearborn, Michigan, USA, July 28–30, 2008
  • Conference Sponsors: Noise Control and Acoustics Division
  • ISBN: 0-7918-4839-6 | eISBN: 0-7918-3830-7
  • Copyright © 2008 by ASME

abstract

This paper presents a passive method to control the broadband noise inside a small enclosure using multiple, optimally located, T-shaped acoustic resonators. The resonators consist of two mutually perpendicular tubes: one short and one long. The significance of the T-shaped acoustic resonator is its large aspect ratio, which makes it possible to be integrated into host structures to reduce the space requirement in implementation. When the resonator is introduced into a noisy enclosure, the re-radiation from its aperture, excited by the primary source, interacts with the existing sound to effectively attenuate the noise level inside the enclosure. A general model is developed, representing the acoustic interaction between the enclosure and multiple resonators, which is used to evaluate the acoustic performance of the resonators. Based on the understanding of the coupling between resonators and enclosure modes, both targeted and nontargeted, a sequential design method is proposed to determine the optimal location of the resonator. Numerical simulations are carried out to demonstrate the implementation procedures of noise control in several resonance peaks of a right parallepiped enclosure. Experiments are also conducted to validate the theory and the design method. The agreement between the theoretical and experimental results shows that, with the help of the presented theory, noise levels within a relatively broad frequency band in an enclosure can be successfully attenuated using optimally located acoustic resonators.

Copyright © 2008 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In