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Auditory Evaluation of Sounds Radiated from a Vibrating Plate Inside a Damped Cavity

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This paper deals with the auditory perception of sounds radiated from a vibrating plate inside a damped cavity. It focuses on the adjustment of vibroacoustic computation efforts with the prospect of using vibroacoustic simulations to enhance the quality of the radiated sounds from the design stage of structure. The adjustment issues appear as important when working with synthesized sounds. Also, when sounds are synthesized from computations in frequency under vibroacoustic prediction tools, computational efforts are inherently dependent on a first restrictive parameter: the maximum limit frequency. Thus, as a first step, this frequency parameter is aimed at being adjusted up to a value which would allow a conservation of the perceptual outcomes concerning an optimal structural design, originally obtained from the auditory evaluation of a set of recorded sounds. To reach this aim, recorded sounds are acquired from an experimental cavity-backed plate; they actually correspond to sounds radiated from the vibrating plate inside the air cavity, recorded for different structural configurations of the experimental system. The latter configurations involve the controlled variation of three structural parameters: the plate thickness, the plate tightening conditions and the cavity sound absorption properties. The recorded sounds are first pairwise submitted to a jury of listeners who are asked to give dissimilarity and preference judgments. From the analysis of the collected data, reference perceptual results are established, in terms of perceptual space, preference space and preference ranking. Afterwards, the adjustment process aims at finding out, from a lowpass filtering applied to the recorded sounds, a cutoff frequency within their entire frequency content allowing the reference perceptual results to be preserved.
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Document Type: Research Article

Publication date: 01 March 2009

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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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