Sound radiation of panel-form loudspeaker using flat voice coil for excitation

Jiang, C. H.; Kam, Tai‐Yan; Chang, Yung-Jung

doi:10.1016/j.apacoust.2016.10.009

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…The panel as the diaphragm receives the vibration from the exciter instead of the cone paper of general loudspeakers and it produces the sound wave propagations by moving the compression of the air. The sound quality of the device can be sensitively changed depending on the shape of the panel and the performance of the exciter [3,4]. In previous studies, the development of panel speakers for sound quality improvement was carried out based on actual measurements.…”

Section: Introductionmentioning

confidence: 99%

31‐1: Numerical Approach for Sound Quality Prediction of the Large‐sized OLED Panel Speaker

Shin

Park

Seo

et al. 2022

Symp Digest of Tech Papers

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In this study, we proposed a numerical approach to predict a sound quality of the large‐sized OLED panel speaker. In order to perform accurate numerical analysis of the panel speaker, it is necessary to build the entire display module and the multiphysic simulation of elastic and acoustics must be analyzed. In this study, we totally constructed a three‐dimensional (3D) finite element model of the OLED panel to analysis the multi‐physics and it is sequentially simplified to reduce the computational cost. The modified incident condition is applied as an external pressure boundary condition to correct the total energy decrease by increasing the operation frequency. The results of the proposed method was verified by numerical simulations and experimental measurements.

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Section: Introductionmentioning

confidence: 99%

31‐1: Numerical Approach for Sound Quality Prediction of the Large‐sized OLED Panel Speaker

Shin

Park

Seo

et al. 2022

Symp Digest of Tech Papers

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show abstract

“…When subjected to forced vibration, a plate will radiate sounds that may affect the surrounding environment. Hence, many researchers have proposed different methods to study the sound radiation behavior of plates [22][23][24][25][26][27][28][29][30][31][32][33]. For instance, Lomas and Hayek [26] presented a Green function solution to study the steady-state vibration and sound radiation of elastically restrained rectangular plates.…”

Section: Introductionmentioning

confidence: 99%

“…Jiang et al [32] used a First-order Shear Deformation Theory (FSDT) based Ritz method to determine the optimal diameter of a centrally located ring load to make a sound radiation plate produce a relatively smooth SPL curve. Later, Jiang et al [33] proposed the use of strip type exciters to excite composite plates for sound radiation. They used a CPT based Ritz method to study the sound radiation efficiency of the composite plates subjected to a plural number of line loads and suggested the use of at least three transverse line loads to obtain relatively smooth SPL curves.…”

Section: Introductionmentioning

confidence: 99%

Sound Enhancement of Orthotropic Sound Radiation Plates Using Line Loads and Considering Resonance Characteristics

Nayan

Kam

2021

Acoustics

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A new vibro-acoustic method is presented to analyze the sound radiation behavior of orthotropic panel-form sound radiators using strip-type exciters to exert line loads to the panels for sound radiation. The simple first-order shear deformation theory together with the Ritz method is used to formulate the proposed method that makes the vibro-acoustic analysis of elastically restrained stiffened orthotropic plates more computationally efficient than the methods formulated on the basis of the other shear deformation theories. An elastically restrained orthotropic plate consisting of two parallel strip-type exciters was tested to measure the experimental sound pressure level curve for validating the effectiveness and accuracy of the proposed method. The resonance characteristics (natural frequency and mode shape) detrimental to sound radiation are identified in the vibro-acoustic analysis of the orthotropic plate. For any orthotropic sound radiation plate, based on the detrimental mode shapes, a practical procedure is presented to design the line load locations on the plate to suppress the major sound pressure level dips for enhancing the smoothness of the plate sound pressure level curve. For illustration, the sound radiation enhancement of orthotropic plates with different fiber orientations for aspect ratios equal to 3, 2, and 1 subjected to one or two line loads is conducted using the proposed procedure. The results for the cases with two line loads perpendicular to the fiber direction and located at the nodal lines of the major detrimental mode shape may find applications in designing orthotropic panel-form speakers with relatively smooth sound pressure level curves.

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Geometric optimization of dielectric elastomer electrodes for dynamic applications

et al. 2021

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Sound radiation of panel-form loudspeaker using flat voice coil for excitation

Cited by 6 publications

References 23 publications

31‐1: Numerical Approach for Sound Quality Prediction of the Large‐sized OLED Panel Speaker

31‐1: Numerical Approach for Sound Quality Prediction of the Large‐sized OLED Panel Speaker

Sound Enhancement of Orthotropic Sound Radiation Plates Using Line Loads and Considering Resonance Characteristics

Geometric optimization of dielectric elastomer electrodes for dynamic applications

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