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The Spectroscopic Determination of Surface Topography Using Acoustic Surface Waves

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Rayleigh waves reflected from features in a surface may be used to characterise the feature geometry and, by manipulation of the spectrum of the reflected signal, the information of interest (the impulse response of the features) can be separated from other spurious information. Two methods for effecting this are described. The first, using manipulation in the complex frequency domain, has been verified using a slot as target and two-digit interdigital transducers as generator and detector, having bandwidths in excess of 1 to 10 MHz. The second method uses the cepstrum of the signal and gives similar results but has wider practical application.
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Document Type: Research Article

Publication date: April 1, 1974

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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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