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50.0 MB (50.0 MB compressed)
4827 x 3621 pixels
40.9 x 30.7 cm ⏐ 16.1 x 12.1 in (300dpi)
ANDREW BROOKES, NATIONAL PHYSICAL LABORATORY / SCIENCE PHOTO LIBRARY ANDREW BROOKES, NATIONAL PHYSICAL LABORATORY / SCIENCE PHOTO LIBRARY
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.
Model release not required. Property release not required.