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On the Sensitivity of Conjugate Acoustic Wave at Parametric Resonance Conditions to Small Wave Length Variations

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The magneto-acoustic wave phase conjugation is simulated numerically in a sample of finite length under parametric resonance conditions. The magnetostrictive effect induced in the material by a variable magnetic field is taken into account as a sound velocity modulation under a linear pumping assumption. The present numerical simulations fill up the gaps between the analytical solutions recently discovered for discrete values of the sample length to acoustic wavelength ratio. A high sensitivity of the conjugate wave amplification rate is underlined even for small variations in the above ratio. A technical solution is then proposed in order to limit this effect in practice.
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Document Type: Research Article

Publication date: January 1, 2013

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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