◎ Choose a hearing aid whose sound gain (amplification ability of hearing aid) is greater than or equal to the hearing loss value 1/2 ~ 2/3. For patients with hearing loss of 80 decibels, hearing AIDS with sound gain of 40 ~ 50 decibels should be equipped.
◎ The wider the audio range, the better. The audio frequency range of normal human ear is 20 ~ 20000 Hz, and the audio frequency range of hearing aid is 300 ~ 4000 Hz.
◎ The greater the signal-to-noise ratio, the smaller the noise.
When the harmonic distortion is less than 5%, the sound above 10% will be distorted.
Finally, some patients need to amplify sound waves; Others need to compensate for frequency loss, and they should choose according to their specific needs and illness.
Maintenance and moistureproof are the key.
For patients who are already equipped with hearing AIDS, the use and maintenance should not be sloppy.
◎ Daily maintenance, moistureproof is the key. When washing your face, taking a bath or raining, you must take off your hearing aid.
Hearing AIDS are often worn, and the earwax and ear secretions produced by the human body will affect the service life and must be cleaned frequently. ◎ When the battery power is lower than a certain level, the sound quality will become rough and unstable, so the battery should be replaced immediately to prevent leakage and corrosion. ◎ The components in the hearing aid are connected by very small wires, which are easy to break after impact and need to be protected from impact.