Home >> Acta Acustica united with Acustica, Volume 90, Number 6

Conical Apertures in Panels; Sound Transmission and Enhanced Absorption in Resonator Systems

Author: Vigran, T.E.

Source: Acta Acustica united with Acustica, Volume 90, Number 6, November/December 2004 , pp. 1170-1177(8)

Publisher: S. Hirzel Verlag

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Abstract:

The sound transmission loss and the input impedance of conical apertures in walls are calculated extending the classical work of Wilson and Soroka [1] on cylindrical apertures and the work of Mechel [2] on slit shaped apertures. The input impedance is used to design distributed Helmholtz resonator type of absorbents; a perforated panel placed at a given distance in front of a hard wall or ceiling. Calculations, corroborated by measurements both in a standing wave tube and in a reverberation room, show that using conical shaped apertures as opposed to normal holes or slits may greatly enhance the capability of absorbers of thick panels as gypsum, wooden chipboard, plywood etc.

Document Type: Research article

Publication date: 2004-11-01

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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