Vibration and Sound Radiation Characteristics of Composite Flat-Panel Sound Radiator

Abstract:

The vibration and sound radiation characteristics of laminated composite flat-panel sound radiators are studied via both theoretical and experimental approaches. In the theoretical study, a finite element model is presented to formulate the forced vibration of the sound radiators. The first Rayleigh integral is used to construct the sound pressure level curve of the sound radiators. In the experimental study, a laminated composite sound radiator was subjected to sweep sine excitation to determine the frequency response spectrum from which the natural frequencies of the sound radiator were identified. The sound radiator with salt powder distributed on its top surface was excited to generate the vibration shapes of the sound radiator at several selected frequencies. The SPL curve of the sound radiator was also measured experimentally. The experimental results are then used to verify the feasibility and accuracy of the proposed finite element model.

• Periodical: Applied Mechanics and Materials (Volume 431)
• Pages: 177-181
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.431.177
• Online since: October 2013
• Authors: C.H. Jiang*, T.Y. Kam
• Keywords: Composite Plate, Sound Pressure, Sound Radiation, Vibration

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