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Frequency Shift of an Acoustic Wave Train due to Atmospheric Absorption

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Abstract:

The spectrum of an acoustic wave train propagating through the atmosphere is modified by the frequency dependent absorption, thus inducing a significant frequency shift of the wave train. Maxima of this frequency shift are found which reach a magnitude of several π rad s−1 (for a pulse length of 10 ms), and depend on acoustic frequency and pulse length, and atmospheric parameters.

Zusammenfassung

Das Spektrum eines sich in der Atmosphäre ausbreitenden, akustischen Wellenzugs wird durch die frequenzabhängige Absorption verändert. Dadurch wird eine signifikante Frequenzversetzung des Wellenzugs hervorgerufen. Die Maxima dieser Versetzung erreichen eine Größe von mehreren π rad s−1 (bei einer Impulslänge von 10 ms), wobei die Versetzung von der Schallfrequenz, der Impulslänge sowie von atmosphärischen Parametern abhängt.

Sommaire

L'absorption atmosphérique, qui dépend de la fréquence, modifie le spectre d'un train d'ondes au cours de sa propagation, induisant ainsi un glissement de fréquence tout à fait significatif. On a recherché les valeurs maximales de ce déplacement de fréquence, qui peut atteindre une ampleur de plusieurs π rad s−1 pour une durée d'impulsion de 10 ms et qui dépend à la fois de la fréquence centrale et de la durée du train d'ondes ainsi que des paramètres physiques de l'atmosphère.

Document Type: Research Article

Publication date: 1980-03-01

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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