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Messung der Schallintensität mit einer Vielfach-Mikrophonanordnung

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This paper describes a new measuring principle to determine the sound intensity. Its main feature is a measuring probe consisting of many microphones which are situated on a spherical surface and which scan the sound pressure on the surface. By processing the measured data, the average sound pressure as well as the three components of its gradient, and from them the intensity vector, can be evaluated. This arrangement has the advantage of increased accuracy when high quality microphones are used.

Zusammenfassung

In dieser Arbeit wird ein neues Meßprinzip zur Bestimmung der Schallintensität beschrieben. Sein Hauptbestandteil ist eine aus vielen Mikrophonen bestehende Meßsonde, die sich auf einer Kugelfläche befinden und den dort herrschenden Schalldruck abtasten. Durch eine einfache Weiterverarbeitung kann man aus den Meßwerten den mittleren Schalldruck sowie die drei Komponenten seines Gradienten bestimmen und daraus den Intensitätsvektor. Der Vorteil dieser Anordnung besteht in geringeren Anforderungen an die Qualität der Einzelmikrophone bzw. in einer erhöhten Meßgenauigkeit.

Sommaire

On décrit ici un nouveau principe de mesure pour déterminer l'intensityé acoustique. Il consiste essentiellement en une sonde métrologique faite d'un assemblage de nombreux microphones disposés à la surface d'une sphère et mesurant chacun la pression acoustique existant en son emplacement respectif. Un traitement simple des données ainsi recueillies donne accès à la pression acoustique moyenne, aux trois composants de son gradient et, par suite, au vecteur intensité acoustique. L'avantage essentiel d'un tel dispositif réside dans la réduction des exigences de qualité sur chaque microphone individuel, ou, à qualityé égale, dans une amélioration notable de la précision.
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Document Type: Research Article

Publication date: November 1, 1990

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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