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Method for optimizing additional quality position of curvel vibration type sheet loudspeaker

A technology of additional mass and bending vibration, applied in the direction of sensors, transducer circuits, sensor components, etc., can solve problems such as modal analysis of speakers without thin plates

Inactive Publication Date: 2006-11-15
NANJING UNIV
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Problems solved by technology

[0010] FEMLAB's tools can be applied to the field of acoustics: but there is no modal analysis for the vibration of thin-plate speakers, so that a speaker design with good performance can be obtained by optimizing the sound pressure frequency response curve of a bending-vibration type thin-plate speaker

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  • Method for optimizing additional quality position of curvel vibration type sheet loudspeaker
  • Method for optimizing additional quality position of curvel vibration type sheet loudspeaker
  • Method for optimizing additional quality position of curvel vibration type sheet loudspeaker

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Embodiment Construction

[0052] The concrete steps of the design method of the present invention are specified below in the mode of giving examples:

[0053] 1. According to the PDE module of FEMLAB software, the bending vibration model of the thin plate is established. Including defining thin plate parameters and boundary conditions, then meshing the thin plate, and performing modal analysis and steady state analysis respectively to obtain the modal distribution of the thin plate without additional mass and the normal velocity of the thin plate surface vibration, and finally according to the Rayleigh integral The formula calculates the corresponding sound pressure frequency response curve. Respectively as figure 1 (a), figure 2 solid line and image 3 shown by the solid line.

[0054] 2. Define various parameters of the additional mass, and combine the genetic optimization algorithm to obtain the best position of the additional mass when the modal distribution of the thin plate is relatively uni...

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Abstract

This invention discloses an optimizing method for the attached mass position of a curve vibration thin plate loudspeaker including: setting up a curve vibration thin plate model based on a PDE module of a FEMLAB software to define its parameter and its border conditions, then carrying out network division to the plate and mode analysis and that of the steady-state to get the mode distribution when the plate is not attached by the mass and the normal velocity of its surface vibration, then combining the inherit optimization algorithm to optimize the mode distribution so as to get the optimum position of different attached masses under rather smooth mode distribution and fixing the attached mass on a related optimum position of the plate to get a better sound pressure frequency response curve and finally getting related sound pressure frequency response curve based on the computation of Rayleigh integral formula.

Description

technical field [0001] The invention relates to an additional mass method for optimal design of the sound pressure frequency response curve of a bending vibration type thin plate loudspeaker, in particular to an additional mass method for the optimal design of the sound pressure frequency response curve of a bending vibration type thin plate loudspeaker based on the PDE module of FEMLAB software combined with a genetic optimization algorithm . Background technique [0002] Compared with the traditional cone-shaped loudspeaker, the bending-vibration thin-plate loudspeaker (hereinafter referred to as the thin-plate loudspeaker) has the following advantages: simple structure, wide high-frequency directivity, and no environmental interference. After its shape is decorated, it has a strong ornamental value and is favored by many consumers. [0003] However, there is still a big gap between thin-plate speakers and traditional high-fidelity speakers in terms of sound reproduction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/20H04R3/00H04R29/00
Inventor 沈勇张素珍安康殴达毅王涵
Owner NANJING UNIV
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