Sifflets — Théorie de fonctionnement et rendement
Theoretical and experimental study of police whistles from which ultrasonic sirens are derived—experimental proof of the fact that edge tones are not formed in the whistles in normal operation—different types of whistles for audio and ultrasonic frequencies—theory
of operation and derivation of equations for the output of a whistle—experimental confirmation of these results.
Document Type: Research Article
Publication date: 01 January 1954
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