Conventional bone-conduction and bone-anchored hearing aids are tested
with skull simulator devices; individual adjustments are reliant on p
sychoacoustic free-field audiometry, which can be quite demanding for
the patient. A method is presented in which the induced skull vibratio
ns are measured with an accelerometer and then analysed with Fast Four
ier Transformation (FFT). With this method, frequency characteristics,
harmonic distortion and dynamic response can be analysed.