Novel noise-proof earmuff

Abstract

The invention provides a novel noise-proof earmuff. The novel noise-proof earmuff is characterized in that sound absorbing and insulating parts are elliptic or in shapes of human ears and can be used for covering concave spaces of the human ears; single earmuff is totally 2 to 3cm in thickness; a first sound absorbing layer manufactured from nonwoven fabric, a second sound absorbing layer manufactured from sound absorbing cotton, a sound insulating layer formed by a plastic film, and a third sound absorbing layer manufactured from polyurethane foamed plastic or formed by a mineral wool board are sequentially arranged in the outermost layer formed by a porous plastic plate; jointing parts manufactured from soft rubber are in shapes of elliptic rings or rings like human ears and are matched with annular surfaces of the sound absorbing and insulating parts, wherein the jointing parts are adhered on the annular surfaces of the sound absorbing and insulating parts, and tubular ports are arranged at the jointed parts; sealing covers or sealing plugs manufactured from soft rubber or plastic are arranged at opening parts of the tubular ports, wherein the sealing covers or the sealing plugs can be used for sealing the ports and separated from the tubular joints. The novel noise-proof earmuff can be applied to the scanning of MRI (Magnetic Resonance Imaging) and also can be used for some special occasions like a construction site, a hospital, an airport and a workshop; the novel noise-proof earmuff is able to prevent both high-frequency field and low-frequency field, and has a wide market prospect.

Description

technical field [0001] The invention relates to protective products, in particular to a novel anti-noise earmuff. Background technique [0002] Since the first nuclear magnetic resonance was used in the human body in 1977, it has been widely used on patients as the most advanced, effective and intuitive technology. In the process of use, we found that a lot of noise will be generated during the MRI scan, causing discomfort and even fear to the examinee. If the subject moves due to nervousness, it will affect the scan results. As Professor Mansfield, the 2003 Nobel Laureate in Medicine said, the biggest shortcoming of MRI scanners is that they are too noisy. [0003] Existing solution one is to adopt inner plug type earplug, but its biggest problem is to cause ear blood circulation to be not smooth, stimulate acupuncture point, bring discomfort. [0004] The second is to directly use the simple earmuffs provided by the manufacturer, which are composed of simple plastic she...

AI Technical Summary

Problems solved by technology

[0006] The present invention is to provide a new type of anti-noise earmuffs to solve the harm of noise to the examinee and the influence on the scanning results during the nuclear magnetic resonance examination in the hospital, and at the same time, it can also protect the human ears in other places with high noise

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