Computerized in-situ test for bone conduction hearing aids

Conventionally, bone-conduction (BC) hearing aids are tested with skull simulator devices and the individual adjustments are reliant on psychoacoustic free-field audiometry. Here we present a novel PC-based system for in situ measurements of BC hearing aids. With the presented system, we are able to measure the hearing aid induced skull vibrations in relation to the individual BC hearing threshold at given frequencies. According to the preliminary measurements, the vibration levels are relatively low but the system is sensitive enough for relevant measurements.