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Important tips:
How to solve failures
yourself
In selecting your PRISMA 2 hearing instruments you have
chosen extremely dependable devices. However, should a
fault occur, it can usually be corrected quickly.
If the instrument whistles
Test the instrument yourself by closing the sound
outlet opening with your fingertip.
If the whistling disappears, the instrument is in
order.
Check that the ear mould sits properly in your ear.
Also test the hearing tube for leaks.
If the whistling noise is still audible, only your hearing
instrument specialist can provide assistance.
Sound
outlet opening
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