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The Application of the Acoustic Telescope in Architectural Acoustics

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Abstract:

The development of a system capable of determining the spectral and spatial distribution of noise sources generated by modern jet engines, known as the acoustic telescope, has interesting applications in architectural acoustics. In this paper a microphone array and an associated data acquisition system is proposed, that is directional in three planes, and so may be used to identify sound sources within enclosures. The system will be useful in studying diffusion and the important acoustical sensation of space, which a listener usually experiences in a concert hall or auditorium. The system might also have uses in public address systems and perhaps more generally as a directional microphone in source location.

Zusammenfassung

Das akustische Teleskop, ein System, das die spektrale und räumliche Verteilung von Schallquellen, insbesondere moderner Düsenflugzeuge, zu bestimmen gestattet, hat auch in der Bauakustik interessante Anwendungsmöglichkeiten. In der vorliegenden Arbeit wird eine Anordnung, bestehend aus einer Mikrophonmatrix und einem zugeordneten Datenerfassungssystem vorgeschlagen, die in drei Ebenen richtungsempfindlich ist und dadurch zur Identifizierung von Schallquellen in geschlossenen Räumen verwendet werden kann. Das System kann ausgenutzt werden bei der Untersuchung der Schallstreuung und des wichtigen akustischen Raumeindrucks eines Hörers in einem Konzertsaal bzw. einem Auditorium. Anwendungen ergeben sich ebenso bei Lautsprecheranlagen und, vielleicht noch allgemeiner, als Richtmikrophon zur Ortung von Schallquellen.

Sommaire

Le télescope acoustique est un système capable de déterminer les distributions spectrale et spatiale des sources de bruit engendrées par les moteurs à réaction modernes. On montre ici qu'il possède également d'intéressantes applications en acoustique architecturale. Le système proposé se compose d'un réseau de microphones et d'un système d'acquisition de données. Il est directionnel dans trois plans et se prête donc à l'identification des sources acoustiques dans les enceintes. Il sera utile pour étudier la diffusion et la sensation d'espace acoustique telle qu'un auditeur l'éprouve dans un auditorium ou une salle de concert. Le système pourrait avoir aussi des applications dans les problèmes de sonorisation et plus généralement dans les problèmes de localisation exigeant des microphones directifs.

Document Type: Research Article

Publication date: 1979-10-01

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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