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Aktive Kontrolle einfacher, selbsterregter Resonatoren

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For two examples - a Helmholtz resonator and the Rijke tube - the principles of self-excited resonators and their active control are discussed. After theoretical explanations of the stability behaviour, results of measurements are shown, which demonstrate that level-reductions of up to 40 dB can be achieved with little effort and without high accuracy of the parameters in the electro-acoustical feed-back loop.

Zusammenfassung

An Hand zweier einfacher Beispiele - dem angeströmten Helmholtz-Resonator und dem Rijkschen Rohr - warden die prinzipielle Wirkungsweise selbsterregter Resonatoren und die Möglichkeiten ihrer aktiven Kontrolle diskutiert. Die nach theoretischen Überlegungen zur Stabilität geschilderten MeßBergebnisse belegen, daß Pegelminderungen von bis zu 40 dB mit geringem Aufwand und ohne große Anforderungen an die Genauigkeit der im Kompensationskreis einzustellenden Parameter erzielt werden können.

Sommaire

A partir de deux exemples pratiques (le résonateur de Helmholtz et le tube de Rijke) on analyse le principe de fonctionnement des résonateurs auto-entretenus et les possibilités de leur contrôle actif. Après une discussion théorique de leurs processus de stabilisation, on présente des résultats expérimentaux prouvant qu'on peut atteindre facilement des réductions de niveaux de l'ordre de 40 dB sans exiger du circuit électro-acoustique de rétro-action des performances hors du commun du point de vue de la qualité et de l'exactitude.
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Document Type: Research Article

Publication date: October 1, 1989

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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