Otoplastic device for directing small levels of sound to an eardrum with least possible loss stops as close as possible to an eardrum

摘要

An otoplastic device (OD) has a sonic tube that stops as close as possible to an eardrum. The diameter of the sonic tube is tuned to directing small levels of sound. On an end facing an eardrum, the OD has an enlargement like a Mozart snout, which locks an auditory canal at this point.