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an earmuff

A technology for earmuffs and ears, which is applied in the direction of earmuffs, etc., can solve the problems of sacrificing wearing comfort, unsatisfactory protection effect, and difficulty in voice communication, and achieve the effect of improving sound insulation effect, light and thin structure, and reducing wall thickness requirements

Active Publication Date: 2021-01-01
上海超颖声学科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the protection effect on low-frequency (such as below 500Hz) noise generated by most mechanical equipment is not ideal
In the prior art, in order to improve the noise protection effect in the low-frequency band, the shell wall thickness of the earcup had to be increased as much as possible, and at the same time, the depth of the earcup was increased to fill more sound-absorbing materials, which made the product bulky and greatly sacrificed Wearing comfort
Moreover, due to the excessive reduction of higher frequency noise, it also blocks the important voice information carried by this frequency band, making voice communication between workers difficult

Method used

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Embodiment Construction

[0052] In order to design a low-frequency noise protection earmuff with a thin structure, the embodiment of the present invention combines the metamaterial spacer with the earcup shell, and through the overall design of the mechanical impedance matching relationship between the metamaterial spacer and the shell, the earmuffs can be effectively improved. The low-frequency sound insulation and sound absorption performance of the cover. In order to make the above objects, features and advantages of the embodiments of the present invention more comprehensible, specific embodiments of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0053] In some embodiments of the present invention, the designed earmuffs include at least one earcup, the aforementioned earcup also includes a shell; the shell includes a quasi-vertical end away from the ear side and approximately parallel to the ear, and an end approximately p...

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Abstract

The invention relates to an earmuff. The earmuff comprises at least one ear cup. The ear cup further comprises a shell. The shell comprises a quasi vertical end which is far away from the ear side andparallel to the ear approximately, and a quasi horizontal end which is perpendicular to the ear approximately. The shell is provided with an accommodating cavity; an ultra-material spacer is arrangedin the accommodating cavity, and the ultra-material spacer comprises a side frame and a thin sheet arranged in the side frame; at least one ultra-material spacer is arranged. The earmuff is concise and light and thin in structure and comfortable to wear, can isolate and absorb low frequency noise transmitted to ears effectively, and does not affect voice communication at relatively high frequency.

Description

technical field [0001] Embodiments of the present invention relate to a noise protection structure, in particular to an earmuff. Background technique [0002] Industrial modernization has greatly improved production efficiency, but the accompanying electromechanical noise has brought health hazards that cannot be ignored for industrial workers. The measure to reduce noise damage is generally to wear earmuffs or earplugs. These products are generally divided into two categories of active and passive. The active noise protection device collects the noise spectrum information through the sensor, controls the built-in micro-speaker to generate a sound wave that is opposite to the noise to form energy offset, so as to achieve the purpose of noise reduction. However, due to its complex structure, low reliability and high cost, the scope of use is limited. Passive noise protection devices have a good protective effect in high-frequency bands (such as above 1500 Hz), and wearing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F11/14
CPCA61F11/14
Inventor 黄礼范
Owner 上海超颖声学科技有限公司
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