21 December 2012

The music of non-life

The previous post touched on whale music in the world ocean. Non-living systems can create kinds of music too:
Dunes near Al-Askharah in Oman sometimes sing notes of almost every possible frequency from 90 to 150 hertz, or F-sharp to D.

A black hole can project sounds across the intergalactic cloud at 56 octaves below the B flat below middle C.

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