Sound attenuation and noise reduction device

Abstract

The invention discloses a sound attenuation and noise reduction device and belongs to the technical field of sound attenuation. The sound attenuation and noise reduction device comprises sound attenuation covers and a base plate. The sound attenuation covers each comprise a horn-shaped cover body, a vibrating film, a permanent magnet and a coil. Layers of vibrating films are fixed on the inner sides of openings of the horn-shaped cover bodies; the permanent magnets are fixed in the middles of the inner sides of the vibrating films; the coils encircle the peripheries of the permanent magnets and are fixed on the inner walls of the horn-shaped cover bodies; when the vibrating films vibrate, the permanent magnets make magnetic line cutting movement in the coils; fixing lug rings are arranged on the tails of the horn-shaped cover bodies; radiating holes are formed in the horn-shaped cover bodies; and the multiple rows of sound attenuation covers are closely arranged on the base plate and fixed to the base plate through the fixing lug rings. The sound attenuation and noise reduction device not only has the sound attenuation function of a sound attenuation hole, but also absorbs more noise than the simple sound attenuation hole; the radiating holes are formed in the horn-shaped cover bodies, so that coil radiating is strengthened; and the vibrating films are fixed inside the horn-shaped cover bodies, so that the noise can be better collected, and the noise is eliminated to a greater extent.

Description

Technical field [0001] The invention relates to a noise reduction and noise reduction device, which belongs to the technical field of noise reduction. Background technique [0002] The sound-absorbing board is a kind of plate-shaped material with the function of noise reduction and noise reduction. It is mainly used in places that need to eliminate noise and echo, such as factories, theaters, concert halls, etc. The existing sound-absorbing panels are mainly realized in two ways, one It is to use sound-absorbing materials to silence the sound; the other is to use sound-absorbing holes on the sound-absorbing plate to achieve sound cancellation. The first way, the sound-absorbing effect of sound-absorbing materials is related to the cost. Good sound-absorbing materials are very expensive, and the cost is too high, which is not conducive to large-scale promotion and application; the second way, through the sound-absorbing structure of the sound-absorbing hole, although part of the n...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a noise reduction and noise reduction device, which solves the problem that the noise elimination effect of the current simple noise reduction hole structure is not ideal.

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