NB Hearing
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Hearing Aid How hearing instruments work

  • Sound enters the hearing instrument through one or two microphones.
  • In digital hearing instruments, the sound is analyzed to define its pitch, loudness and direction. This is done by one or more microchips that drive the hearing instrument’s technology. Some hearing aids are more sophisticated than the most sophisticated personal computers.
  • The microchip is set by the audiologist to compensate for specific amounts of hearing loss at different pitches. It directs the amplifier to increase sounds by specific amounts, at specific pitches.
  • The sound is delivered to the ear through an outlet in the instrument.