A bow-type giant magnetostrictive audio transducer

Abstract

The invention discloses a bow stretching type giant magnetostrictive audio transduction device comprising a bow stretching type framework, a giant magnetostrictive telescopic rod, a coil, a coil casing, a heat dissipation sleeve matching the coil casing, a left permanent magnet rod, a right permanent magnet rod, a left fixing baffle, a right fixing pressure plate, a plastic washer, and a compression bolt. The beneficial effects are as follows: the output displacement is large, and the sound intensity is high; mechanisms such as a return spring are not used, and the overall structure is simple; by using the bow stretching type framework, the displacement of the giant magnetostrictive telescopic rod is enlarged effectively, and displacement along the axial direction of the rod is converted into displacement vertical to the rod, and the height of the transducer is reduced; and through use of the heat dissipation sleeve, the influence of coil heating on the performance of the giant magnetostrictive material is reduced.

Description

technical field [0001] The invention belongs to the technical field of bone conduction communication, and relates to a bow-type giant magnetostrictive audio transducer. Background technique [0002] Traditional battlefield voice communication is through air conduction, and the integrated design of earplugs and earphones is adopted. While accurately receiving voice signals, it reduces the ability to perceive the surrounding environment, resulting in the inability to accurately perceive the dynamics of the surrounding environment and equipment status. If the ears are not fully plugged, it will affect the accurate reception of orders from superiors. The bone conduction communication system uses human bones, nerves, and muscles to transmit sound without occupying the human ear canal. Users can hear the sound of the surrounding environment while listening to bone conduction sound. The bone conduction drive element is a purely mechanical vibration component. There is no potential...

AI Technical Summary

Problems solved by technology

However, piezoelectric materials have the defects of narrow vibration response frequency band and small stretching strain, which leads to weak sound intensity, and there is still a big gap in performance compared with existing electromagnetic products.

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