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Geometrical Acoustics for Rectangular Rooms

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Geometrical room acoustics on the basis of an image method is presented to predict the sound intensity, reverberation, and the decay curve in a rectangular room. The results coincide with the wave theory and the physical meaning of such matters as the axial, tangential, and oblique waves in a rectangular room is interpreted explicitly in the aspect of geometrical acoustics. A formula for a room whose boundary surfaces are not simple shapes is also presented and illustrated by examples.

Zusammenfassung

Es wird ein auf der Spiegelungsmethode basierendes Verfahren der geometrischen Raumakustik zur Berechnung der Schallintensität und des Nachhallverlaufs rechteckförmiger Räume vorgestellt. Die Ergebnisse stimmen mit wellentheoretischen Resultaten überein; die physikalische Bedeutung von axialen, tangentialen und nicht senkrechten Wellen in einem Rechteckraum wird vom Standpunkt der geometrischen Raumakustik interpretiert. Überdies wird eine Formel für Räume mit nicht einfacher Berandung angegeben und durch Beispiele verdeutlicht.

Sommaire

L'acoustique géométrique et la méthode des images sont appliquées au calcul de l'intensité, de la réverbération et de l'extinction du son dans une salle rectangulaire. Les résultats coïncident avec ceux de la théorie ondulatoire, dont certains concepts, comme ceux des modes axiaux, tangentiels et obliques sont interprétés explicitement par l'acoustique géométrique. On présente également une formule pour une salle à parois plus compliquées et on l'illustre par des exemples.
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Document Type: Research Article

Publication date: November 1, 1979

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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