Technology: Jobs for the Jiggle

Vibration is usually a dirty word in the space age lexicon. The delicate instruments of missiles, aircraft and spacecraft function best in a smooth environment, and scientists are continually searching for means to eliminate the least little bump. But deliberate vibration has its uses too, and last week, in widely separated laboratories, engineers were putting man-made jiggles to work. Applications:

>A "telephone" for deaf-mutes, developed at Israel Institute of Technology in Haifa, uses a compact set of vibrators to communicate as many as 67 words a minute. The "speaker" taps out his message on a set of switches...

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