hearing aids

Jochen Wolters jochenw at messua.informatik.rwth-aachen.de
Tue Mar 21 01:41:40 EST 1995


dak at messua.informatik.rwth-aachen.de (David Kastrup) writes:

>hartman at das.harvard.edu (Anthony Hartman) writes:

>>Finally, are there any devices that deal with the problem of background
>>noise well enough to understand a conversation in a crowded room?

>The sound processing currently performed by the typical
>devices is not much.

Considering the size of modern hearing aids, I'd say they do offer quite a
lot of signal processing. Expecially if compared to older designs.

>The background noise problem is being worked on by scientists, but I don't
>think the commercial situation will much improve in the next 5 years or so.
>Most approaches need more than one microphone, by the way.

>The problem with background noise is also that the device has to
>decide which noise is background and which not. The human hearing
>does this by focusing, a mental activity. Hearing aids cannot know
>what you want to hear, so they have to guess.



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