A bone conduction transmitter

Abstract

The invention discloses a bone conduction microphone, which belongs to the technical field of audio transmission, and comprises: a housing on which a limiting hole is arranged; a positioning post located at the center of the housing, the positioning post and the positioning post Cooperate with the limiting hole to limit the free rotation of the positioning column; the center magnet is sleeved on the positioning column; two sets of reverse induction coils are set on the center magnet; one end of the lead wire is set through the FPC conductive rubber plate The two sets of reverse induction coils are fixed between the two groups of reverse induction coils, and the other end passes through the housing; the suspension is symmetrically arranged at both ends of the central magnet. The invention changes the traditional matching method of the shell and the positioning column, from the traditional circular hole matching to the triangular or polygonal matching method, which can effectively reduce the deviation of the central magnetic circuit caused by tolerance matching, and reduce the magnetic gap difference in the symmetrical direction, thereby Reduce the rubbing problem caused by the up and down vibration of the voice coil.

Description

technical field [0001] The invention relates to the technical field of audio transmission, in particular to a bone conduction microphone. Background technique [0002] There are two ways for external sound to enter the inner ear of the human body, including air conduction and bone conduction. Among them, air conduction refers to the transmission of sound to the inner ear through the outer ear and middle ear, while bone conduction technology refers to converting vibration signals into electrical signals by picking up vibration receivers. Specifically, the bone conduction technology is to place the pickup vibration receiver close to the head or neck of the human body, and use the slight vibration of the head and neck bones caused by the human speech to collect the sound signal and convert it into an electrical signal and output it. Bone conduction technology does not require air as a sound transmission medium, so there will still be a high-definition sound output in a strong ...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the noise reduction effect of the microphone, in the existing technology, double voice coils and suspension symmetrical design are adopted, but the double voice coils used are separated or not fixed well, that is, the double voice coils are directly welded and fixed. Difficult, so when in use, the vibration generated by the voice coil will produce a little phase difference due to delay, and there will still be some noise remaining, which will affect the use

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