Bone-conduction microphone

Abstract

The invention discloses a bone-conduction microphone, which belongs to the technical field of audio transmission, and comprises a shell provided with a limiting hole; a positioning column which is located at the center of the shell, wherein the positioning column is matched with the limiting hole to limit free rotation of the positioning column; a central magnet which is arranged on the positioning column in a sleeving manner; the two groups of reverse induction coils which are annularly arranged on the central magnet; a lead wire, wherein one end of the lead wire is arranged between the two groups of reverse induction coils through an FPC conductive rubber plate so as to fix the two groups of reverse induction coils into a whole, and the other end of the lead wire penetrates out of the shell; and suspension pieces which are symmetrically arranged at the two ends of the central magnet. A traditional matching mode of the shell and the positioning column is changed, a traditional round hole matching mode is changed into a triangular or polygonal matching mode, center magnetic circuit deviation caused by tolerance matching can be effectively reduced, the magnetic gap difference in the symmetrical direction can be reduced, and therefore the problem that a voice coil vibrates up and down to generate collision is solved.

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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