In-ear hearing aid air hole with multifunctional air hole

Abstract

The invention is applicable to the technical field of hearing aids, and provides an in-ear hearing aid air hole with a multifunctional air hole. The in-ear hearing aid air hole comprises a shell assembly and an air hole assembly. The shell assembly comprises an in-ear part and a limiting part. An inner air port and an outer air port are formed in the opposite sides of a limiting part and an in-earpart. An anechoic chamber is arranged in an inner cavity of the limiting part. A transverse spacer and a vertical spacer are arranged in an inner cavity of the anechoic chamber. When howling sound wave with the wavelength of lambda is transmitted into the outer air passage from the outer air port, and in the propagation process from the outer air channel to one side of the inner air channel and one side of the inner air port, when the sound wave reaches the position a, the howling sound wave is divided into two coherent waves which respectively passes through the distance of r1 and the distance of r2. Since the difference between r1 and r2 satisfies odd times of half-wavelength lambda / 2, when two beams of coherent waves are transmitted to a point b, the purpose of noise elimination can beachieved, and the problem that a traditional in-ear hearing aid is provided with a straight-through air hole on the side surface to solve the problem of blockage and the problem of squeal caused by sound feedback can be avoided.

Description

technical field [0001] The invention belongs to the technical field of hearing aids, in particular to an in-ear hearing aid air hole with multi-functional air holes. Background technique [0002] Hearing aids are devices that help people with hearing loss improve their hearing impairment, thereby improving their ability to communicate with others. In-ear hearing aids are placed in the ear canal when worn, which is comfortable to wear, easy to take and wear, and can make full use of the sound collection function of the outer ear. It has good concealment and is relatively unobtrusive. [0003] Since the in-ear hearing aid is placed in the ear canal when worn, it blocks the passage between the ear canal and the outside air. When worn for a long time, it is easy to cause the ear to be airtight (difference in air pressure) and feel uncomfortable; Lifespan also plays a role. Traditional in-ear hearing aids add a straight vent on the side to solve the problem of blockage, but it ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an in-ear hearing aid air hole with multi-functional air holes, which aims to solve the problem of a traditional in-ear hearing aid adding a straight air hole on the side to solve the problem of clogging, but it will also cause feedback of sound and cause howling. question

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