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Method for decreasing acoustic radiation of plate or film via surface slotopening

A technology of sound radiation and slot holes, which is applied to the sound radiation caused by the vibration of the membrane, reduces the field of the plate, can solve the problems of reducing sound radiation, etc., and achieves good results.

Inactive Publication Date: 2005-01-19
单树军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the vibration is reduced by changing the material and thickness of the plate and membrane, and adding a damping layer, thereby reducing its acoustic radiation.
It is a brand-new technical approach to reduce the sound radiation without reducing the vibration of the plate and membrane, and there is no such method yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0008] Example: A 30cm×30cm glass with a thickness of 6mm was softened and then punched to form densely distributed rectangular cross-sectional grooves parallel to one side with a pitch of 2mm, a width of 2mm, and a depth of 4mm on one side of the glass. A sound insulation test was performed on the glass. On the ungrooved side (outside) of the glass, apply a sound field with an intensity of 100dB, and the frequency is 1 / 3 octave of 100HZ-8000HZ. The sound pressure level on the inner side of the measurement is: the average sound insulation of the glass surface is increased by 9.2dB compared with the original average sound insulation after the grooved treatment of the glass surface, and the sound insulation effect is equivalent to increasing the thickness of the glass to 10mm. That is, the surface slot treatment reduces the sound radiation of the glass plate by 9.2dB on average.

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Abstract

The invention supplied a method that can decline echo without reducing vibration of the board or diaphragm, but instead with the superficial of the board or diaphragm being densely covered with chase and gaping place.

Description

Technical field [0001] The invention relates to a method for reducing acoustic radiation caused by vibration of a plate and a membrane. Background technique [0002] The plate and membrane vibrate under the action of excitation force, sound field, magnetic field, etc., and radiate the sound field outward through coupling with the surrounding fluid. At present, methods such as changing the material and thickness of the plates and membranes, and adding damping layers are used to reduce their vibration, thereby reducing their acoustic radiation. Instead of reducing the vibration of the plate and membrane to reduce the acoustic radiation, it is a brand-new technical approach. There is no such method. Summary of the invention [0003] Without reducing the vibration of the plate and the membrane, the present invention proposes a method of performing slotting treatment on the surface of the plate and the membrane (including partial surfaces, omitted below) to reduce the acoustic radiat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R7/02
Inventor 单树军
Owner 单树军
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