Skull conducting apparatus

A conduction device, skull technology, applied in the direction of sensors, sensor types, sensor components, etc., can solve the problems of low conversion efficiency, narrow frequency response range, complex production process, etc., to achieve the effect of good waterproof and impact resistance

Inactive Publication Date: 2009-04-01
北京开摩微电技术中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It converts "electrical energy" into "vibration energy" with low conversion efficiency, narrow frequency response range, and complex production process

Method used

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  • Skull conducting apparatus
  • Skull conducting apparatus

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Such as figure 1 The electrical schematic diagram of the skull conduction device is shown. 1 is the audio signal input terminal, and VCC is the power supply terminal. The working circuit of the skull conduction device is composed of audio phase shifting circuit, power amplifier circuit, boost matching circuit and piezoelectric ceramic chip in series.

[0020] The audio phase shift circuit is composed of three RC phase shift circuits connected in series. The audio signal input by the input end is shifted in phase by the action of the audio phase shift circuit. By shifting the phase of the audio signal, the feedback self-excited whistling caused by the signal being amplified and fed back to the input is suppressed. It should be pointed out here that feedback self-excitation is caused by the same phase of the feedback signal and the input signal. As long as the aud...

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Abstract

The invention provides a skull conduction device composed of vibration transducer using HTD as main body and audio frequency phase shift booster amplifier adapter circuit matched therewith. The audio frequency phase shift circuit, power amplification circuit, booster matching circuit and vibration transducer are serially connected; the audio frequency phase shift circuit is inputted by audio frequency electrical signal at input end; the output end of boost matching circuit connects with vibration transducer. The vibration transducer comprises a HTD with a central hole; copper substrate 3 serving as anode of the transducer, silver plating layer 4 serving as cathode of the transducer separately connects with two output end of boosting transformer at two sides of piezoelectric material 2 of HTD. Nylon bolt 5 passes nylon gasket 6, HTD and fastens with nut 8. The fastened HTD outer layer is wrapped and sealed by silica gel 7, thereby reducing sound leakage and possessing relatively better water-proof and anti-impact performance.

Description

Technical field [0001] The invention relates to a skull conduction device, in particular to a device that converts the electrical energy of an audio signal into vibration energy by using a piezoelectric method, and conducts it to the auditory center through the skull, so that people can hear the sound. Background technique [0002] There are many schemes that can effectively convert audio signal electric energy into vibration, such as magneto-electric coil type, magneto-electric reed type, magneto-electric diaphragm type and so on. Chinese patent ZL01803995.2 discloses that a bone conduction speaker in a hearing aid is a magnetoelectric diaphragm type. It has a low conversion efficiency for converting "electric energy" into "vibration energy", a narrow frequency response range, and a complicated production process. Summary of the invention [0003] The main purpose of the present invention is to solve the above-mentioned problems and provide a combination of a vibration transduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R17/00H04R23/00
Inventor 梁群何伟
Owner 北京开摩微电技术中心
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