In an even more preferred embodiment, referring to the example of FIG. 1, the diaphragms 26 and crystals 38 are hard-wired to a source 48 of periodic electrical energy (which may be an oscillator, AC generator, or other device which will produce an alternating electric field) inside the control console 44 in such a matter that the handle 24 and diaphragms 26 may not be disconnected from the contro