Tech Tip – Weak or Dead Instruments and the Effect of Wax

Wax build-up is the most common cause for “weak” or “dead” custom instruments being returned to ReSound for repair. To illustrate the impact of a plugged wax filter, response curve Hearing Instrument Test (HIT) measures  were obtained for a hearing instrument in two different scenarios.  It was run once with a plugged wax filter and […]

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