Disadvantages of box hearing aid

Jinghao listening expert answers

1. It is easy to produce noise when the box hearing aid rubs with clothes, which makes the hearing impaired sound noisy and unclear.

The box type hearing aid is mainly placed in the user’s pocket or on the clothes. When people move, the clothes will rub against the hearing aid and produce noise. This kind of friction sound will affect the deaf’s effective listening to the sound.

2. Increase unnecessary low frequency gain.

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Because the box type hearing aid is placed on the human body, the human body is equivalent to a barrier, the external sound wave is transmitted to the body, and the low-frequency part of the sound can be reflected to the microphone of the hearing aid, thus increasing the low-frequency gain of the hearing aid. For most deaf people, it is useless to have too much low-frequency gain. One is that the residual hearing of most deaf people is better than that of high-frequency, so we hope that hearing aids have better hearing compensation in the high-frequency part, while the compensation in the low-frequency part is relatively less.

Moreover, the low-frequency reflection gain of the box hearing aid will bring unfavorable masking effect to the high-frequency amplification of the hearing aid, thus reducing the adaptability of the box hearing aid. Secondly, because most of the environmental noise belongs to the low-frequency range, the body low-frequency reflection gain of the box hearing aid will obviously enlarge the environmental noise, and make the signal-to-noise ratio of the box hearing aid smaller and the speech intelligibility lower.

3. The box hearing aid is not beautiful.