A Theoretical Criterion for End Face Alignment in the Cylindrical Acoustic Interferometer
A more rational criterion for the end face alignment of the widely used cylindrical acoustic interferometer is sought to replace the usual intuitive requirement that the depth of any geometrical imperfection should be small compared to the acoustic wavelength. Whilst the latter criterion may be proved to be adequate for an instrument operated below its first cut-off frequency, it may very well be inadequate in the case of the ultrasonic instrument where the number of modes which are able to propagate is, for practical purposes, unlimited. Optical alignment of ultrasonic cavities is found to be adequate for many, but not all, ultrasonic interferometers. Where it is inadequate other acoustic alignment procedures should be possible.
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Document Type: Research Article
Publication date: 01 December 1976
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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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