Sound Absorption Qualities of a Cross-Shaped Isolated Acoustic Resonator
Abstract:In the paper, the sound absorption qualities of cross-shaped isolated acoustic resonator are considered. The sound absorption area of the resonator and the real and imaginary parts of the slit impedance, when the slit width varies from 20 cm to 60 cm, were computed from the formulas obtained by us.
It has been found experimentally that when the slit of the cross-shaped resonator is 30 cm wide and 60 cm deep, the maximal sound absorption coefficient is reached under 200 Hz and is equal to 0.2, while the absorption is 2 m2. After the increase of the resonator slit depth to 180 cm, the maximal absorption coefficient is obtained at 160 Hz and is equal to 0.4, the absorption area being 9 m2. In both cases the reverberation times are equal and come out to about 0.1 s.
Document Type: Research Article
Publication date: 1998-05-01
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- 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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