“SUB” MEN ANNOYED
NOISY OCEAN NOISES PALO ALTO (California), July. The American Physical Association was told by Dr. Fernono Knudson that underwater warfare was the most difticut problem facing the navy. The atomic bomb had made surface warfare obsolete and had increased the importance of sub-surface vessels. The principal difficulty in devising techniques in underwater craft was a communication system with visual means. Scientists had discovered with new sensitive instruments that oceans were actually noisy. A study of 30 sea creatures had shown that croaker fish, of whom there were 300,000,000 in Chesapeake Bdy, created 119 decibels of sound, compared with 85 of a busy city street. i Sea" life and movement created noises —“grinding, crunching, clicking, thumping, poping, drumming, sucking and scraping”—all of which must be “screened” before the noises of enemy underwater craft could be used precisely to place the size, speed and position of enemy underwater craft.
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Bibliographic details
Gisborne Herald, Volume LXXIV, Issue 22440, 22 September 1947, Page 6
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150“SUB” MEN ANNOYED Gisborne Herald, Volume LXXIV, Issue 22440, 22 September 1947, Page 6
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