Anechoic tile

Anechoic tile

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Credit: ANDREW BROOKES, NATIONAL PHYSICAL LABORATORY/ SCIENCE PHOTO LIBRARY

Caption: Anechoic tile. These polyurethane tiles were developed as an acoustic absorber for sonar frequency water tanks. The tiles are very absorbant and minimise echoes (reflection) of water-borne sound above a frequency of 20 kilohertz. These tiles are used to provide the conditions needed for underwater acoustic tests.

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