Tinnitus measuring device, transforms frequencies picked up by ultrasound microphone applied to mastoid bone, into frequencies that can be heard by patient

摘要

An ultrasound microphone (1) on the mastoid bone picks up frequencies not normally perceivable by the human ear, and transforms them to the audible range using a frequency generator (2) and an oscilloscope (4). After transformation, the picked-up sound is amplified so that external persons and the patient can hear it.