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Electroacoustic conversion device

An electro-acoustic conversion and piezoelectric sheet technology, which is applied in electrostatic transducer speakers, frequency/directional characteristic devices, electrical components, etc. requirements and other issues to achieve good performance

Active Publication Date: 2015-09-09
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of the material and process of the dynamic electro-acoustic conversion device, it is difficult to increase the high-frequency cut-off frequency
[0003] With the application of 4G communication, a super wideband (super wideband) electro-acoustic conversion device is required, and the high-frequency cut-off frequency can reach 16kHz and above, but the existing dynamic electro-acoustic conversion device has been difficult to meet the requirements

Method used

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Examples

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Embodiment Construction

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0026] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0027] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods and devices should be considered part of the description.

[0028] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have differen...

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Abstract

The invention discloses an electroacoustic conversion device, comprising a vibration system and a magnetic circuit system with a magnetic gap. The vibration system comprises a vibration membrane, a voice coil combined below the vibration membrane and suspended in the magnetic gap, a piezoelectric plate combined at one side of the vibration membrane, a first frequency dividing circuit connected with the voice coil, and a second frequency dividing circuit connected with the piezoelectric plate. The first frequency dividing circuit performs frequency dividing on an external input first path sound signal so as to obtain a low frequency signal and outputs the low frequency signal to the voice coil. The second frequency dividing circuit performs frequency dividing on an external input second path sound signal so as to obtain a high frequency signal to drive the piezoelectric plate. The electroacoustic conversion device has both a moving coil sounding structure and a piezoelectric sounding structure, and has two frequency dividing circuits; when a high frequency signal is input, the piezoelectric plate drives the vibration membrane to vibrate to give out sound; when a low frequency signal is input, the voice coil, under the action of a magnetic field, drives the vibration membrane to vibrate to give out sound, so that a super wideband electroacoustic conversion device with good performance is realized.

Description

technical field [0001] The invention relates to an electroacoustic conversion device. Background technique [0002] Ordinary dynamic receivers and speakers are collectively referred to as dynamic electroacoustic conversion devices. Whether it is applied to mobile phones or earphones, the high-frequency frequency response curve of the receiver will drop rapidly at 6k-9kHz, and the high-frequency frequency response curve of the speaker will also drop rapidly after more than ten KHz. high-frequency cut-off frequency. Due to the limitations of the material and process of the dynamic electro-acoustic conversion device, it is difficult to increase the high-frequency cut-off frequency. [0003] With the application of 4G communication, the electro-acoustic conversion device of super wideband is required, and the high-frequency cut-off frequency can reach 16kHz and above, but the existing dynamic electro-acoustic conversion device has been difficult to meet the requirements . C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R23/02H04R1/22H04R9/025H04R9/06H04R19/02H04R31/003H04R2209/024H04R2400/11
Inventor 单连文杨鑫峰王海荣崔龙浩
Owner GOERTEK INC
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