Hearing aid Telicoil driver

Nov 28, 2008 4 Replies
M

I've got around to building a loop driver, so my neighbour can listen to her TV. The loop is only sofa sized, and I can pick up the mag field with a small inductor, which rises at 6dB/oct, as expected



Should I put a 6dB/oct roll off, from say 100Hz in the loop driver, or is this already compensated for in the hearing aid telecoil setup



Not much that I could find on the www



martin


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P

"Martin Griffith"

** Hardy an adequate description.

Is it an constant current amplifier or not ??

** Be lucky if a hearing aid works down to 100Hz.

In any case, constant current drive to the loop is standard practice.

..... Phil

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formatting link

Or search for "47 C.F.R. § 68.316"

Paul Hovnanian mailto:Paul@Hovnanian.com ------------------------------------------------------------------ Where am I going, and what am I doing in this handbasket?
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R

I think it is already compensated for within the hearing aid. Remember the hearing aid needs to ignore the electrical wiring of the house.

Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what\'s the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P
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P

She could use a service like the one Garrett Morris provided on SNL (News for the Hard of Hearing).

Paul Hovnanian paul@hovnanian.com ----------------------------------------------------------------------- Have gnu, will travel.
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