Talking about ear molds and acoustic characteristics

The ear mold is to connect the human ear with  Hearing aid  The acoustic coupler is a part of the hearing aid system. It transmits the amplified sound of the hearing aid to the external auditory canal and tympanic membrane. It is customized according to the shape of the human ear concha cavity and external auditory canal.


XNUMX. The role of ear molds

(1) Fixed Hearing aid

(2) Prevent acoustic feedback

(3) Improve acoustic characteristics

Second, the classification of ear molds

According to the size of the ear mold occupies the auricle and the external ear canal, the ear mold can be divided into a plugged ear type and a non-plugged ear type.

 1. Plugging ear molds are divided into standard, shell, skeleton, half-shell, ear canal, ear lock, and helix ear canal ear molds.

 2. Non-plugging ear molds: The biggest feature of non-plugging ear molds is to completely eliminate the discomfort of the wearer, and completely retain the auricle of the outer ear and the acoustic effect of the external auditory canal.Non-plugging ear molds include sound tube ear molds, free field ear molds, Jansse ear molds, and CROS ear molds.There are three types of shape designs for non-plugging ear molds.This type of ear mold is suitable for patients with mild to moderate hearing loss.

Third, the acoustic characteristics of the ear mold

The acoustic coupling system of the ear mold is composed of ear hooks, sound pipes, sound holes, vents and dampers.Generally speaking, the vent controls the acoustic effect in the low-frequency region of the hearing aid, the damper controls the acoustic effect in the mid-frequency region of the hearing aid, and the horn sound hole controls the acoustic effect in the high-frequency region of the hearing aid.

Link:      Talking about ear molds and acoustic characteristics

REF: Hearing AidsITE hearing aidsHearing Loss
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