Langevin Develops Active Sonar for Submarine Detection and Fathometry

Article abstract: Langevin developed the first active ultrasonic underwater sonar transducer for detecting reflected sound from submerged objects and the seafloor.

Summary of Event

The concept of detecting submerged objects using acoustic waves impinging on and reflected from an underwater vessel has been argued as inherent in any detailed understanding of acoustic wave propagation in the ocean, sound velocity in liquids, viscous frictional damping of underwater sound, and sound radiation and diffraction patterns. Sir Isaac Newton’s Philosophiae...

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