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Analyse de la structure spatio-temporelle d'un champ acoustique à l'aide de sa transformée de Fourier optique

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A new opto-electronic method involving optical Fourier transform and interferometry is proposed. This method allows experimental studies of space-time structures which could appear in transparent media such as acoustic fields or free jets. Nowadays this method has been successfully applied in the experimental study of an acoustic wave guide. Phase velocities and relative amplitudes of the simultaneous propagating modes have been measured and compared with theory.


Nous proposons une nouvelle méthode opto-électronique permettant l'étude spatio-temporelle de structures ordonnées dans les milieux transparents du point de vue optique et la- mesure de leur vitesse de phase, en particulier. La validité du procédé associant la transformation de Fourier optique et l'interférométrie est vérifiée expérimentalement en l'appliquant à l'étude des différents modes se propageant dans un guide d'onde acoustique.


Es wird eine optronische Methode vorgeschlagen, mit deren Hilfe geordnete Strukturen in durchsichtigen Medien räumlich-zeitlich auf optischem Wege untersucht und besonders ihre Phasengeschwindigkeit gemessen werden können. Die Gültigkeit des Verfahrens, das auf der Verwendung der optischen Fourier-Transformierten und der Interferometrie beruht, wird experimentell durch die Untersuchung der verschiedenen Moden geprüft, die sich in einem akustischen Wellenleiter ausbreiten.
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Document Type: Research Article

Publication date: June 1, 1980

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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