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Hearing Aid Technology

Hearing Aid Technology

Hearing Aid Technology

Today’s Hearing Aids are miniature computers which are designed with only one goal in mind, to make you hear better. Via special software they will be programmed to compensate best for your hearing problems.

A microphone will collect all ambient sound and converts it to a digital signal, this signal will then be modified based on your audiogram and noise sensitivity data which will be reconverted to an analogue signal and presented to your ear via a miniature loudspeaker.

Key Technology Features

The heart of a hearing aid is the DSP (digital signal processor). Like with a computer, the DSP’s effectiveness depends on the processor speed, RAM and the flexibility and sophistication of the software.

The DSP controls signal processing in channels, multi microphone performance and features, noise management, feedback management and many more.

Channels – depending on the software the DSP breaks down the incoming signal typically into 4 – 16 channels. Overall signal and feature processing quality & flexibility depend then on this number of channels.

Multi microphone performance – by measuring the signals which arrive at different microphones separated by tiny time differences the DSP can ignore signals or signal parts from certain directions. This technology improves speech intelligibility in noise.

Noise management – software on the DSP measures the content of signal and noise in each channel and accordingly applies filters or applies less amplification in channels where noise is present.

Feedback management – by measuring the amount of feedback present, the DSP can effectively apply phase cancellation and remove it instantaneously. This is not just convenient but also very important for sound quality.

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