Noise reduction

Speech contains the important message. Noise describes the environment, but if it is very strong, it may make intelligibility difficult.

​

Acoustically, the speech is formed by harmonic waves. Background noise, by inharmonics. Hearing aids are based on this fact to reduce the amplification of noise and increase it in words.

​

 

The devices look for the best voice / noise relationship to promote understanding. The noise can not be eliminated because it also provides information, but it must be left to a level that the brain understands easily with the least effort.

​

The wind is very annoying for hearing aids, but it has until recently been very difficult to solve.