Scientists Investigate Cause of 'Singing Dunes'

(PhysOrg.com) -- In more than 30 locations around the world, the phenomenon of singing sand dunes has intrigued explorers, tourists, and scientists. When an avalanche occurs or even when the sand is pushed by hand, it emits a powerful, monotonous sound that can last up to several minutes and be heard more than a mile away. Sometimes observers mistake the noise for a loud, low-flying aircraft. Although scientists have spent many years investigating the sound, the cause remains a mystery. Studies have suggested that the singing dunes phenomenon is a completely new way of generating sound.

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