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Influence of Gas Filling on the Sound Isolation of Glass Insulating Panes

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Through gas filling the sound isolation of insulations glass panes is improved in the middle and higher frequencies. The overall effect arises from various effects, from a lowering of the sound level in the pane-cavity and from modifying the excitation and radiation of the second pane. By the use of heavy gases the sound level in the cavity is diminished because the free waves in the cavity are essentially weaker than in the case of air. The filling of gas therefore acts similarly to filling the cavity with a sound absorbing material.

The light gases become positively excited through the anomalous well-known effect of flexurally excited plates when λ G > λ L. In both cases at middle and higher frequencies, for different physical reasons, there is a reduction of the stiffness of the pane-cavity from 10 to 20 dB compared with an air filling. The favorable effect of filling with gas is limited at high frequencies by the solid-borne transmission through the stiff bonding of the isolating glass-panes at their edges. More significantly for practical application a gas-filling is inaffective at low frequencies, as soon as the dimensions of the panes are small compared with the wavelength λ L of sound.
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Document Type: Research Article

Publication date: September 1, 1977

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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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