Alternative Fibreless Absorbers – New Tools and Materials for Noise Control and Acoustic Comfort
A survey is given on Alternative Fibreless Absorber ALFA tools and materials as developed over the past 20 years by an alliance of Fraunhofer scientists with industrial partners. Twelve fairly different reactive and active sound absorption concepts were thoroughly investigated and successfully brought into the market. A case history describes a completely new type of broadband sound attenuator which seems to confirm A. de Saint-Exupéry's statement that "perfection is not completed when nothing more may be added but when no more can be deleted". The philosophy and strategy behind these ongoing innovation processes were displayed in a companion paper in this journal .
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Document Type: Research Article
Publication date: May 1, 2001
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- 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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