What is the role of intelligent noise reduction in hearing aids during wearing?

In the process of using hearing aids in the past, when we talk softly, we always feel that the background noise in the environment is also amplified at the same time, so that the speech signal of soft talk is not very clear; or, when the user of the hearing aid is driving a car When you open the car windows at the same time, the wind outside will become particularly loud.Now with hearing aids to the newly researched “adaptive noise management system”, it can better improve the hearing of hearing aid wearers in noisy environments. The “Adaptive Noise Management System” performs real-time evaluation of the sound signals entering the hearing aid: the input signal related to the language changes randomly, because when we speak, the voice is up and down, the instantaneous waveform of the speech spectrum is very different, and the standard deviation is also very large. Large; while the input signal related to noise is stable and continuous, the waveform is relatively stable, and the standard deviation is small.

In patients with sensorineural hearing impairment, due to the damage of the inner and outer hair cells of the cochlea, the resolution of frequency and time is reduced, the signal-to-noise ratio is reduced, and the dynamic range is narrowed.Therefore, in a complex environment, especially in the presence of noise, the speech discrimination ability is reduced and discomfort occurs. That is to say, the significant decrease in the listening effect in a noisy environment is the biggest complaint of sensorineural hearing aid users. It is an important factor affecting the satisfaction of hearing aid wearers and even the refusal to use hearing aids.The noise reduction system is to increase the wearing comfort in the presence of background noise.The frequency region containing useful signals (speech, music) has the largest gain, while the region containing noise has little or no gain.

In terms of noise processing, the noise management system will immediately detect incoming sound signals from the outside world. Once a signal with a stable waveform and a certain strength is detected, it is considered a noise signal.Use the principle of multiple compression channels to reduce the gain of a single channel where noise is detected. At the same time, use patented technology to continuously and synchronously perform accurate statistics and evaluation of the speech and noise ratio in the signal, and timely change the gain of the channel where the noise signal is located. To achieve the purpose of reducing noise without reducing the degree of speech comprehension.Use “adaptive noise management system”Hearing aid, Even in a noisy environment, people with hearing loss can enjoy clearer and more comfortable hearing.



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