A hearing Aid is an electronic device to assist the challenge of hearing well, however the basic function or utility of the hearing aid remains similar, thanks to the advancing hearing aid technology we now have access to Digital Hearing Aid technology providing people multiple features than the earlier analog hearing aids. Manufacturers are providing different technology levels and plenty of features. Choosing the ones we actually need requires understanding of the features. We have listed 4 prime features in your digital hearing aid.
Hearing Aids are set by the audiologist depending on the power need as well as the lifestyle of the person.
1. Multi Channel
Digital Hearing Aids have the choice of multiple channels. The frequency spectrum or the hearing range is divided into channels; each channel processes the speech/sound signal as per the need.
Manufacturers provide digital hearing aids from 2 channels to 24 channels. As hearing aid technology is advancing speedily, the number of processing channels will keep on rising.
How do Multichannel Digital Hearing Aids assists?
Though 2 channels are also sufficient, a basic Digital Hearing aid with 4 to 6 Channels or bands will perform better. A higher number of channels give the audiologist better control to lessen background noise as well as fine tune for better performance.
2. Digital Noise Reduction
Background Noise is one of the most general reasons for rejection of hearing aid by the user. The Hearing aid microphone will accept and amplify the speech as well as the nearby noise; amplified noise irritates the user and masks the speech making it hard to understand.
How Noise Reduction in Digital Hearing Aids assists?
Digital Hearing Aids have a tiny microprocessor that is programmed to identify background noise and lessen it without affecting the speech signal. Lessening of noise leads to clearer speech for the user. This feature is very essential and assists a lot in noisy situations like restaurants or public places.
3. Digital Feedback Reduction
Feedback is the squealing or high pitched sound a hearing aid releases. Most of us are known of this sharp sound that an individual sometime hear during live performances. It is generated by the microphone picking up the amplified sound given out by the speaker. In the same way, in a hearing aid, the amplified speech signal is again caught by the microphone and then further re-amplified forming a continuous loop called as the feedback loop.
How does Feedback Reduction in Digital Hearing Aids help me?
In a hearing aid, the microphone and the receiver (speaker) are pretty close to each other, if the placement of the receiver in the ear is not proper the amplified sound leaks out and picked up by the microphone and delivered to the amplifier for re-amplification. This results in a squealing sound. This squealing sound is louder than the speech signal so the hearing aid user is incapable to hear any speech. The feedback reduction feature lessens the feedback or squealing noise.
4. Directional Microphones
Digital hearing aids might have more than one microphone. The benefit of multiple microphones is that the hearing aid user can also pick up speech even if the person is speaking from behind.
How Directional Microphone in Digital Hearing Aids assists?
Previously digital hearing aids had only one microphone that was front facing; speech signals from the back were not picked up properly. Presently, digital hearing aids have a front facing or on top and the other rear-facing microphone. Based on the source of sound the microprocessor in the digital hearing aid chooses which microphone signal has to be amplified more so the user hardly misses out anything. This feature is very helpful for people in the office environment.