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Acoustic Guitar Function Model including Symmetric and Asymmetric Plate Modes

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Abstract:

The majority of past acoustic guitar models have been limited to guitar surface motion that is characterised by symmetric, low frequency modes. This motion has been modelled as an equivalent oscillating piston. There are acoustically important plate modes that do not behave like a piston, such as the (0,1) plate mode, which do not have symmetric mode shapes. To show the feasibility of extending the frequency range and including asymmetric modes, the lower bout of an acoustic guitar is modelled as an equivalent isotropic circular plate in this paper. The pressure propagation is found using a Rayleigh integral approach that takes into account the spatial motion distribution of the plate. The predictions of this model are compared to experimental measurements made on a folk guitar. This approach also requires fewer empirical inputs to get the guitar body's transfer functions and sound pressure level in comparison to past models.

Document Type: Research Article

Publication date: May 1, 1998

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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