RECORD SILENCER
The world's largest "silencer," built to subdue what will soon be one of Great Britain's biggest noises, has been constructed at the new £500,000 Alvis Aero-Engine factory at Coventry. It is a building nearly 200 ft long, in which aero engines of 1400 h.p. and 1000 h.p. will be tested. Two separate buildings, one inside the other, with different foundations have been erected to house a huge fan which will hurl a 150-mile-an-hour wind at the engines. Layers of "wool." made from pulverised rock and spun glass, are attached to the walls, and will absorb the roar, which outside will sound like a murmur. The sound will emerge into the open through a padded tunnel 100 ft long, and will have been reduced from 120 "decibels"—an unbearable noise—to 57 "decibels," which is the strength of normal street traffic noises, '
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https://paperspast.natlib.govt.nz/newspapers/EP19361031.2.18
Bibliographic details
Evening Post, Volume CXXII, Issue 106, 31 October 1936, Page 6
Word Count
141RECORD SILENCER Evening Post, Volume CXXII, Issue 106, 31 October 1936, Page 6
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