If Device Makes A Whistling Sound - OTOFONIX Helix User Manual

Whistling/feedback occurs when amplified sound returns to the microphone and is
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then re-amplified. This can be resolved by lowering the volume (when feasible).
Most hearing aids whistle when the dome is not inserted correctly. Try re-seating the
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ear dome into your ear canal for a better fit.
If whistling occurs when raising the volume, you should try closed domes or
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ZipTips to reduce feedback and increase amplification.
Wax or debris in ear canal, or sound tube, can cause whistling. Clean tubing/tip (see
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page 16 & 17) and ear canal, and replace tubing/tip if they appear worn.
Please note: When an object (hand, hat, person, wall, etc.) comes close to your
ear while wearing hearing aids, you may experience whistling. This is normal for
all microphones, not just microphones in hearing aids.
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If Device Makes a Whistling Sound