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Acoustic Property

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Hailiang Yu – One of the best experts on this subject based on the ideXlab platform.

  • study on vibro Acoustic Property of composite laminated rotary plate cavity system based on a simplified plate theory and experimental method
    International Journal of Mechanical Sciences, 2020
    Co-Authors: Hong Zhang, Qingshan Wang, Hailiang Yu

    Abstract:

    Abstract Effective combination of simplified plate theory (SPT) and the improved Fourier-Ritz method, a unified analytical model for the vibro-Acoustic Property of a laminated rotary plate coupling with an impedance cavity under complex boundary conditions is established in the investigation. The structure-Acoustic coupling potential energy generated by the interaction between the flexible laminated plate and the cavity at the interface is added into the energy functional of the structure domain and the Acoustic domain, and the energy functional of the plate-cavity coupling system is obtained. The solution equation of the vibro-Acoustic coupling Property can be gained through Rayleigh-Ritz energy technique. Besides, by introducing external force or internal sound source, the coupling mechanism between the flexible plate and the cavity is explained thoroughly from two aspects. By comparing the results calculated by the classical plate theory (CPT), the finite element method (FEM), the first-order shear deformation theory (FSDT) and Experimental test, the applicability and accuracy of SPT in analyzing the rotary laminated plate-cavity coupling system are verified. Besides, the effects of geometric parameters, material parameters, elastic boundary conditions, Acoustic medium on the coupling system are mainly studied, which provides theoretical guidance for the design and noise control of such engineering structures.

Hong Zhang – One of the best experts on this subject based on the ideXlab platform.

  • study on vibro Acoustic Property of composite laminated rotary plate cavity system based on a simplified plate theory and experimental method
    International Journal of Mechanical Sciences, 2020
    Co-Authors: Hong Zhang, Qingshan Wang, Hailiang Yu

    Abstract:

    Abstract Effective combination of simplified plate theory (SPT) and the improved Fourier-Ritz method, a unified analytical model for the vibro-Acoustic Property of a laminated rotary plate coupling with an impedance cavity under complex boundary conditions is established in the investigation. The structure-Acoustic coupling potential energy generated by the interaction between the flexible laminated plate and the cavity at the interface is added into the energy functional of the structure domain and the Acoustic domain, and the energy functional of the plate-cavity coupling system is obtained. The solution equation of the vibro-Acoustic coupling Property can be gained through Rayleigh-Ritz energy technique. Besides, by introducing external force or internal sound source, the coupling mechanism between the flexible plate and the cavity is explained thoroughly from two aspects. By comparing the results calculated by the classical plate theory (CPT), the finite element method (FEM), the first-order shear deformation theory (FSDT) and Experimental test, the applicability and accuracy of SPT in analyzing the rotary laminated plate-cavity coupling system are verified. Besides, the effects of geometric parameters, material parameters, elastic boundary conditions, Acoustic medium on the coupling system are mainly studied, which provides theoretical guidance for the design and noise control of such engineering structures.

Woon-seng Gan – One of the best experts on this subject based on the ideXlab platform.

  • ICASSP – A psychoAcoustical preprocessing technique for virtual bass enhancement of the parametric loudspeaker
    2013 IEEE International Conference on Acoustics Speech and Signal Processing, 2013
    Co-Authors: Chuang Shi, Woon-seng Gan

    Abstract:

    The parametric loudspeaker is a novel type of loudspeaker that can project a directional sound beam. It is commonly used in creating personal sound zone and projecting private messages to a targeted audience. However, the parametric loudspeaker possesses a very poor bass (or low-frequency) response due inherently to the nonlinear Acoustic principle generating sound from ultrasound in air. A psychoAcoustic signal processing method known as “virtual bass” has been successfully implemented in some consumer electronics with miniature or flat loudspeaker unit, aiming to enhance their bass performances. In this paper, we adapt this “virtual bass“ approach for parametric loudspeakers. Unlike conventional loudspeakers, the parametric loudspeaker brings in an added degree of complexity in “virtual bass” enhancement due to its inherent nonlinear Acoustic Property. Accordingly, a new preprocessing technique is proposed for the parametric loudspeaker to psychoAcoustically reproduce the low-frequency components within an octave below its cut-off frequency.