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HEARING AIDS and BACKGROUND NOISE
Virtually all patients wearing hearing aids complain about background noise at
one time or another. There is no way to completely eliminate background noise.
Remember, when you had normal hearing there were still times when background noise was a
problem. It is no different now, even with properly fit hearing aids! The good news is
there are circuits and features that help to reduce (or minimize) background noise and
other unwanted sounds. In fact, there are research findings that demonstrate digital
hearing aids with particular circuit and microphone options can effectively reduce
background noises. Please speak with your audiologist about this.
Many early digitally programmable (and even some digital) circuits, which
claimed to reduce or eliminate background noise, actually filtered out low
frequency sounds. This indeed made the sounds appear quieter, however, not
only was the background noise made quieter, but so too, was the signal (the speech sound).
Newer ways to reduce background noise are based on timing and
amplitude cues and other noise processing strategies, which
100% digital hearing aids can incorporate. These methods work,
but are not perfect. Directional microphones are available and
are useful as they help to focus the amplification in front of
you, or towards the origin of the sound source. Directional hearing
aids can offer a better signal-to-noise ratio in difficult listening
situations by reducing a little bit of the noise from the sides or
behind you. In most 100% digital hearing aids, the noise control
features help make noise more tolerable, but do not completely eliminate the noise.
The best and most efficient way to eliminate or reduce background noise is
through the use of FM technology. Please consult with one of our audiologists to find
out more about this.
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