Printer Friendly

Dune tunes.

Trek through the dunes of Sand Mountain, Nevada, and you might hear eerie "music." No, it's not an off-key Elvis impersonator from distant Las Vegas. When wind blows on nearly 100 desert dunes around the world, the sand emits a long, loud, booming noise.

How is this possible? For years, scientists didn't have the grain of an idea. But a team of Canadian researchers may be on their way to solving the mystery. Marcel Leach and Douglas Goldsack knew that "singing sand" grains have super-smooth surfaces. But they discovered the grains are also coated with a thin layer of silica gel, a pearly, slightly sticky mineral. Regular desert sand doesn't have this coating, or this noise.

To find out if silica gel is the "voice," the scientists filled a jar with artificial sand made of tiny silica gel spheres. When they shook the jar, the spheres made a humming sound. What gives? "We know what may be producing the sound," says Leach. "Now we have to figure out for sure how the particles do this."

One hypothesis is that silica gel makes sand grains stick together. When wind blows the sand, the grains shake in unison, producing a simultaneous vibration. And that's what sound is: vibrations traveling through air. (Touch your throat as you talk and you'll see what we mean.) Even Elvis would be impressed.
COPYRIGHT 1997 Scholastic, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1997, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:when the wind blows around the 100 dunes in the Sand Mt area of Nevada, a mournful booming sound is made that might be caused by the simultaneous vibrations of sand grains
Author:allen, Laura
Publication:Science World
Article Type:Brief Article
Date:Nov 17, 1997
Previous Article:Why didn't the deer cross the road?
Next Article:Don't forget your pants.

Related Articles
Sand ripple shape? The shadow knows.
The sandy face of Mars: astronomers ponder the awesome dimensions of Martian dunelands.
Why fountains thunder and dunes boom.
Sand dunes saved! (Earth News).
Shifting sands: dunes hold heaps of material--and climate clues, too.
Dune leapfrogging is deciphered.
Dune tunes.
Sandy clues to ancient climate.

Terms of use | Privacy policy | Copyright © 2020 Farlex, Inc. | Feedback | For webmasters