Changes in bone conduction thresholds with vibrator contact area.
An experimental bone conduction vibrator was used to measure force and acceleration directly at the point of contact, the subject's forehead. Force and acceleration at threshold were measured for six subjects over a frequency range of 250 to 6000 Hz and over a contact area range of five to one. These measurements suggest that for any test subject, the variation in force of threshold with contact area is much smaller than the corresponding variation in acceleration at threshold.
D001298:Audiology / Q000295:instrumentation / Q000379:methods* / Q000592:standards; D001309:Auditory Threshold / Q000502:physiology*; D001844:Bone Conduction; D002138:Calibration; D006801:Humans; D014732:Vibration