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Effectiveness of T-switch

Kate Johnston Kate at ricochet.net
Thu Jul 10 09:13:14 EST 1997

When the t-switch is turned on, your son shouldn't hear anything!  It is 
only when it is near a magnetic field, such as from the telephone 
receiver, that he will hear anything.

The quality of t-switches can vary immensely.  It might be your son's 
t-switches need to be replaced.

That said, I need to add that using a t-switch is not merely a matter of 
simply turning it to "on" and holding up the receiver to the hearing 
aid.  You need to experiment with holding up the receiver to different 
parts of the hearing aid to find out where the sound comes in the 
strongest.  This strongest point is the microphone, where all the sound 
comes in and gets processed in the hearing aid.

I find that if I don't have the telephone receiver placed in just the 
right place on my hearing aid, I might as well not be using the 
t-switch, because I can't hear anything.

Kate Johnston
kate at ricochet.net
Sunnyvale, California

Dana Zuller wrote:
> My 7-year old son wears 2 Unitron US80 Sigma hearing aids.
> He has a bilateral severe-to-profound loss.
> I would like if possible for him to start learning to use the telephone.
> I know this is very difficult but I am hoping that with familiar people and
> simple conversation he can have some conversation.
> The problem is when we switch his hearing aids to the T-switch he says he
> can't hear anything. The telephone is hearing-aid compatible. I listened
> to his aids using a stethoscope at the telephone and could hear someone's
> voice very faintly. I even tried moving all around to see if I could get
> a stronger reception.
> Is this as good as it will get? If so how does anyone use their T-coil?
> For the time being we push the "speakerphone" button and put the volume on
> high.

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