English: Pioneers in the development and application of piezoelectric transducers for the goal of submarine detection (a) Paul Langevin, (b) Robert William Boyle, (c) Cross-sectional view of a form of quartz transducer designed by Boyle in 1917, as recorded in the BIR (Board of Inventions and Research) document 38164/17 {Ref: Manbachi A and Cobbold RSC (2011)
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: cropped Boyle's picture. The original can be viewed here: Pioneers of Submarine Detection.tiff: . Modifications made by נדב ס.
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