Badly madeHearing aid(Ear mold) The ear canal part may be relatively vacant, which will causeHearing aid(Ear mold) Lean to the side of the ear canal wall.This situation may also be caused by the concha cavity effect.The so-called concha cavity effect refers to the angle between the ear canal part of the hearing aid and the bottom of the concha cavity, which closes the ear canal.At this time, the surface of the hearing aid (ear mold) should be polished to reduce the degree of sealing between it and the ear canal and prevent the ear canal from being closed.
The wearer responds that his voice sounds like it is in a bucket, pipe, or feels that his voice is echoed.
When speaking, the vibration of the sound will drive other connected soft tissues, bones and skulls to vibrate.Due to the quality and elasticity of bones and soft tissues, when a part of them starts to vibrate, it will also cause other connected bones and soft tissues to vibrate.However, the vibrations between the bones and soft tissues are not synchronized. This vibration phase difference will form sound waves between the front and inferior walls, and the back and upper walls of the cartilage, and stay in the residual ear canal.Conversely, when the ear canal is in an open state (such as when not wearing a hearing aid, wearing an open hearing aid, etc.), the sound waves caused by the vibration will be released through the external auditory canal, which will not cause the ear plug effect.
Link： How to avoid the ear plugging effect of hearing aids?
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