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Über den Bau eines reflexionsfreien Wassersdiall- MeBbeckens

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A water basin with the dimensions 7 m × 4 m × 4 m was constructed for measurements with water-borne sound. The walls of this basin are coated with absorbers effective in the frequency range from 5 to 70 kc/s. These broad-band absorbers consist of a system of parallel, wedge-shaped rubber plates made up of three layers of rubber glued together. The center sheet is perforated with circular holes (diameter 4 mm, hole density 4%). There are three types of wedges differing in length (7, 15, and 20 cm) covering the frequency range from 5 to 70 kc/s. The reflection factor related to amplitude remains below 10% in this frequency range. The excellent acoustical properties of the unechoic measuring basin are confirmed by the very small standing wave ratio for all frequencies.
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Document Type: Research Article

Publication date: January 1, 1960

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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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