METHOD FOR THE MANUFACTURE OF HEARING AID SHELLS

摘要

The device consists of an ultrasonic probe 12 with multiple rings 13 of piezoelectric transducers combined with integral optical fibres (6, Fig.2) for viewing and illumination. A ball (11, Fig.3) and a guide tube (10) are also provided to permit the easy, fast and safe alignment of the body of the probe relative to the internal surface being contoured. Multiplexer units (16, Fig.5) are provided to reduce the number of electrical wire connections running the full length of the probe.