Full Content is available to subscribers

Subscribe/Learn More  >

Adaptive Resonant Mode Acoustic Controller

[+] Author Affiliations
Adam K. Smith, Jeffrey S. Vipperman, Daniel D. Budny

University of Pittsburgh

Paper No. IMECE2005-79289, pp. 181-190; 10 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Noise Control and Acoustics
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Noise Control and Acoustics Division
  • ISBN: 0-7918-4225-8 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


Helmhotz resonators are popular devices used for passive noise control. These apparatus can be designed to produce a maximum reduction over a narrow frequency range. The frequency of the resonator is dependent upon its volume and shape. Schemes have been proposed to adapt Helmholtz resonators, through changing physical parameters, such as volume and neck area. A recent study by Bisnette and Vipperman (2004) has modeled the passive Helmholtz resonators and realized them electronically in a process that is similar to positive position feedback control in structures. One key difference is the need for phase compensation of the speaker dynamics, which is accomplished with an all-pass filter. Recent extensions to this control method have examined the advantages of using band-pass versus the low-pass resonant filters as well as higher-order Butterworth bandpass filters. Bandpass filters are found to simplify the multi-modal design process by reducing interaction of adjacent modes. Additional refinements include the adaptation of system parameters. By adapting controller gain, damping and control frequency are examined and optimized. Adaptation of system parameters is greatly facilitated through the electronic realization.

Copyright © 2005 by ASME



Interactive Graphics


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

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