Noise reduction methods for earmuffs and earmuffs

Abstract

The embodiment of the invention relates to the field of noise protection, and discloses earmuffs and a noise reduction method by earmuffs. In the invention, the earmuffs comprise at least one cover, asound collecting module, an acoustic foam, a compressing device and a processing unit. The sound collecting module collects the environment noise and obtains the noise amplitude value of the environment noise. The acoustic foam creates acoustic resistance in the cover. The compressing device is used for compressing the acoustic foam in the cover to change the sound resistance in the cover. The processing unit is separately electrically connected with the compressing device and the sound collecting module and pre-stores the preset amplitude value of the environment noise. The processing unit acquires the noise amplitude value obtained by the sound collecting module and calculates a desired resistance value of the acoustic resistance required for reducing the noise amplitude value to the preset amplitude value according to the noise amplitude value. The processing unit further controls the compression amount when the compressing device compresses the acoustic foam according to the desired resistance value. Thus, the acoustic resistance is increased when the acoustic foam is compressed to reduce the environment noise to the preset amplitude value, so that the noise is effectively reduced to reduce the harm to human ears.

Description

technical field [0001] The embodiments of the present invention relate to the field of noise protection, in particular to an earmuff and a noise reduction method for the earmuff. Background technique [0002] Earmuffs are widely used in people's daily life and work to isolate environmental noise and provide users with a relatively quiet environment. There are at least the following problems in the prior art: the current earmuffs mainly use the noise reduction system to generate reverse sound waves equal to the external noise to neutralize the noise, or form a closed space around the ear to block external noise, or use silicone earplugs, etc. Sound insulation materials are used to block external noise, which cannot effectively reduce noise and cause damage to the human ear, resulting in hearing loss for people who live in noisy environments for a long time. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide an earmuff a...

AI Technical Summary

Problems solved by technology

There are at least the following problems in the prior art: the current earmuffs mainly use the noise reduction system to generate reverse sound waves equal to the external noise to neutralize the noise, or form a closed space around the ear to block external noise, or use silicone earplugs, etc. Sound insulation materials are used to block external noise, which cannot effectively reduce noise and cause damage to the human ear, resulting in hearing loss for people who live in noisy environments for a long time

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