Whether the hearing aid is the more channels,the better
Each hearing aid manufacturer's price list has a striking "channel number". Many people used it as a propaganda method. The strange thing is that some users are particularly concerned about this function. The reason I think is that many people lack cognition, and even some audiologists do not know enough about it.
First, what is the channel
Popular point of view, it is an area that can independently adjust the size of the sound, the hearing aid debugging software interface can be seen at a glance.
Second, why digital hearing aids need multiple channels
Normal people's hearing curve is very flat, so that the feeling of various sounds is more balanced. The hearing patterns of deaf patients are often fluctuating. In the case of hearing aids, if individual areas cannot be adjusted independently, some gains will be given, and some will be insufficient. This kind of hearing aid effect is definitely not good.
Third, the role of the channel
According to the customer's hearing situation, the hearing aid is personalized and the customer is more satisfied. Each channel can independently adjust the size of the sound gain, inflection point, maximum output control. (The difference between the two adjacent channels is not too large).
When comparing hearing aids, everyone is accustomed to comparing who has more hearing aid channels. It seems that the more channels, the better the hearing aids. The purpose of multi-channel processing of digital hearing aids is to better match the hearing loss of different shapes. The American audiologists have done research. The optimal number of channels in 4-8 can meet the needs of most hearing patients. If only to meet the hearing curve, four-channel hearing aids will suffice. Recently, multi-channel hearing aids have introduced noise reduction features. The computer chip of the hearing aid detects ambient noise (such as noise of computers, air conditioners, and fans) in each channel, and noise reduction in the channel to improve speech. The clarity.
Generally speaking, the frequency band is a name for different frequency segments, and the channel is a sound processor in different frequency bands of the hearing aid itself. The fundamental difference between all-digital hearing aids and those simulated hearing aids that are on the verge of elimination is that different channels can be compressed with different channels, which has achieved the effect of separate compensation, because the loss of human hearing at each frequency point and segment is not The same, so you have to compensate through different channels.
If there is no channel and frequency band, then there is no difference between a hearing aid and a normal loudspeaker! In general, the more channels, the finer the compensation, the smaller the distortion of the sound heard by the patient, and the higher the clarity.
At this point, the channel is very important. In order to improve the clarity of patients and improve the comfort level under various environmental conditions, modern hearing aids introduce many new ideas in the fitting and debugging of hearing aids. Such as compression amplification, wide dynamic compression, noise reduction, speech spectrum enhancement, acoustic feedback management, wind noise management and so on.
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