DEVICE FOR DIAGNOSIS AND TREATMENT OF AURAL HANDICAP

摘要

PROBLEM TO BE SOLVED: To impart an audible sense to a person who is very hard in hearing by constituting a converter assembly generating a vibration output by receiving a signal in an ultrasonic wave range by being provided with an inertial mass body, a vibration head mass body and a converter including a pull rod imparting compressive force to a piezoelectric ceramic between the inertial mass body and the vibration head mass body. ;SOLUTION: In this device, a converter 20 having a resonance frequency of about 20 to 108 KHz of an ultrasonic hearing aid put on the ears of a person who is very hard in hearing is connected with a synchronizing circuit within a portable electronic housing via electric wire 21. The converter 20 as a piezoelectric longitudinal vibrator is provided with a central piezoelectric ceramic tube 25, a radiating surface, that is, a head mass body 26, and an agitation, that is, an inertial mass body as a tail mass body 27. The radiating surface 26 and the inertial mass body 27 are connected by a pull rod 28 in order that an assembly is protected from a self-destruction caused by large displacement of the radiating surface. The inertial mass body 27 is formed by being provided with an almost cylindrical-shaped housing and a rear plate, and an electric wire strain relief 36 is fitted on the one side by a half holding ring.;COPYRIGHT: (C)1999,JPO