Hearing aid Telicoil driver

[Martin Griffith]

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

 

[Phil Allison]

"Martin Griffith"

I've got around to building a loop driver,

** Hardy an adequate description.

Is it an constant current amplifier or not ??

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

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

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



...... Phil