Gareth (scribeoflight) wrote,
Gareth
scribeoflight

13 more things: The Bloop - 02 September 2009 - New Scientist

IN THE summer of 1997, an array of underwater microphones, or hydrophones, owned by the US government picked up a strange sound. For a minute, it rose rapidly in frequency; then it disappeared. The hydrophones, a relic of cold-war submarine tracking, picked up this signal again and again during those summer months, then it was never heard again. No one knows what made the sound, now known as "The Bloop" (hear it at www.thebloop.notlong.com).

It's not the only mysterious sound heard in the ocean. In May 1997, hydrophones picked up the "Slowdown" sound. Over the course of about 7 minutes, it slowly dropped in pitch, rather like the sound of an aeroplane flying past (www.theslowdown.notlong.com). Its origin has been only loosely pinned down: it seems to have originated from somewhere off the west coast of South America, and could be heard from 2000 kilometres away.

Posted via web from erhebung

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