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Nonmetallic vibration film multilayer piezoelectric speaker

A piezoelectric speaker, non-metallic technology, applied in the field of microphones, to achieve the effect of reducing total harmonic distortion, reducing distortion, and improving sound pressure output

Inactive Publication Date: 2010-06-30
西安康弘新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the piezoelectric speaker and provide a non-metallic diaphragm multilayer piezoelectric speaker with thin thickness, light weight, high sound pressure and low distortion.

Method used

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  • Nonmetallic vibration film multilayer piezoelectric speaker
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  • Nonmetallic vibration film multilayer piezoelectric speaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] exist figure 1 , 2 Among them, the non-metallic diaphragm multilayer piezoelectric loudspeaker of this embodiment is composed of a frame 1 , a nonmetallic elastic diaphragm 2 , and a multilayer piezoelectric ceramic sheet 3 .

[0018] A non-metallic elastic vibrating film 2 is fixedly bonded to the frame 1 with glue, and a multilayer piezoelectric ceramic sheet 3 is bonded to the non-metallic elastic vibrating film 2 with glue.

[0019] The multilayer piezoelectric ceramic sheet 3 of this embodiment is made by laminating and sintering 4 layers of piezoelectric ceramic layers 3-2 and 5 layers of electrode layers 3-1, and one layer of piezoelectric ceramic layer 3-2 is laminated with an adjacent layer An electrode layer 3-1 is arranged between the electric ceramic layers 3-2, and the electrode layer 3-1 is made of Ag / Pd electrode material, and an electrode layer 3 is arranged on the outer surfaces of the two outermost piezoelectric ceramic layers 3-2. -1, the electrode ...

Embodiment 2

[0022] In this embodiment, the multilayer piezoelectric ceramic sheet 3 is made by laminating and sintering two piezoelectric ceramic layers 3-2 and three electrode layers 3-1, and a An electrode layer 3-1 is provided on the outer surfaces of the two piezoelectric ceramic layers 3-2, and an electrode layer 3-1 is provided on the outer surfaces of the two piezoelectric ceramic layers 3-2, and the electrode layers 3-1 on the outer surfaces of the two piezoelectric ceramic layers 3-2 are respectively connected to AC power The electrode layer 3-1 between the two piezoelectric ceramic layers 3-2 is connected to the other end of the AC power supply. The non-metallic elastic diaphragm 2 is the same as that in Embodiment 1. Other components and the coupling relationship of the components are the same as in Embodiment 1.

Embodiment 3

[0024] In this embodiment, the multilayer piezoelectric ceramic sheet 3 is made by stacking and sintering 9 piezoelectric ceramic layers 3-2 and 10 electrode layers 3-1, and one piezoelectric ceramic layer 3-2 is adjacent to one An electrode layer 3-1 is provided between the piezoelectric ceramic layers 3-2, and an electrode layer 3-1 is provided on the outer surfaces of the two outermost piezoelectric ceramic layers 3-2, and each piezoelectric ceramic layer 3-2 The electrode layer 3-1 on one side is connected to one end of the AC power supply, and the electrode layer 3-1 on the other side is connected to the other end of the AC power supply. The non-metallic elastic diaphragm 2 is the same as that in Embodiment 1. Other components and the coupling relationship of the components are the same as in Embodiment 1.

[0025] In order to verify the beneficial effects of the present invention, the inventors used the non-metallic diaphragm multilayer piezoelectric speaker prepared in...

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Abstract

The invention provides a nonmetallic vibration film multilayer piezoelectric speaker, wherein a frame is provided with a nonmetallic elastic vibration film, and the nonmetallic elastic vibration film is provided with a multilayer piezoelectric ceramic sheet. The multilayer piezoelectric ceramic sheet has the structure as follows: the multilayer piezoelectric ceramic sheet is formed by sintering at least two layers of piezoelectric ceramic sheets and electrode layers, the under of which is more one layer of that of the layers of the piezoelectric ceramic sheets; one electrode layer which is connected with AC power supply is arranged between the two adjoining layer of the piezoelectric ceramic sheets; the outer side face of the at least two layers of piezoelectric ceramic sheets are provided with the electrode layers which are connected with the AC power supply; the electrode layer at one side face of each layer of the piezoelectric ceramic sheet is connected with one end of the AC power supply; and the electrode layer at the other side face of each layer of the piezoelectric ceramic sheet is connected with the other end of the AC power supply. The inventor comparatively tests the nonmetallic vibration film multilayer piezoelectric speaker with the multilayer piezoelectric speaker;, and the test result shows that compared with the multilayer piezoelectric speaker, the nonmetallic vibration film multilayer piezoelectric speaker increases the sound pressure level by 6dB, reduces the total harmonic distortion by 14%, and improves the tone quality effect of the speaker.

Description

technical field [0001] The invention belongs to the technical fields of piezoelectric sensors and electrostrictive sensors, and in particular relates to a microphone. Background technique [0002] The piezoelectric speaker is an electroacoustic device that realizes the conversion of electrical energy-mechanical energy-acoustic energy through the inverse piezoelectric effect, that is, it uses the principle of mutual conversion between the piezoelectric effect of piezoelectric ceramics and the mutual conversion of electrical energy and mechanical energy, and attaches it to the flat diaphragm. The piezoelectric ceramic thin-film vibrator inputs an audio voltage signal, causing the ceramic thin-film vibrator to generate bending vibration, thereby driving the flat diaphragm to generate mechanical bending vibration corresponding to the intensity and frequency of the input audio signal to push the air to produce sound. Piezoelectric speakers have been widely used in the audio outpu...

Claims

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Application Information

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IPC IPC(8): H04R17/00H04R7/00
Inventor 陈耀强季叶皇晓辉许龙
Owner 西安康弘新材料科技有限公司
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