Hearing Aid Device

We currently have three final-year projects running on some parts in a hearing-aid devices or perhaps more generally in an apparatus that deals with audio and speech processing.

Within the current projects, the students study a phoneme detector, an auditory scene analysis algorithm (mainly to identify and characterize noise in audio) , and a sigma-delta D/A converter to produce the noise at the boundary of the FPGA.

We are looking for more students to look at other parts, such as

  • an input sigma-delta ADC to sample the sound/speech
  • Matlab/C++/Python software to run a hardware-in-the-loop system
  • a digital filterbank/wavelet for time-frequency analysis of the signals
  • an ultra-low power analog SC filterbank/wavelet for time-frequency analysis of the signals
  • an ultra-low power bandgap reference
  • an ultra-low power input audio buffer and anti-aliasing filter

The ambition is to build an FPGA demonstrator and eventually also an ASIC.

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