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http://dl-live.theiet.org/content/journals/10.1049/jbire.1951.0003
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http://dl-live.theiet.org/content/journals/10.1049/jbire.1951.0004
Ultrasonic generators for high powers
http://dl-live.theiet.org/content/journals/10.1049/jbire.1951.0002
Some generators are described that have been used for the production of high power ultrasonics. Examples of the common piezo-electric and magnetostrictive types are given and briefly considered theoretically. Other less well-known types are also mentioned, and three instruments that have been developed for specialized applications are described. A brief list of some of the uses to which ultrasonics has been put is also included.