They reported this month in the journal Nature that when a jar of silica gel particles of the same size as singing sand grains is shaken, the particles emit a loud sound with a frequency of about 450 cycles per second _ a note roughly the same as A above Middle C.
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Formed by the merger of Indiana Lakeland Girl Scout Council, Girl Scouts of Limberlost Council, Girl Scouts of Singing Sands Council ( except for a part that joined Girl Scouts Heart of Michigan ), and Girl Scouts of Tribal Trails Council ( except for a part that joined Girl Scouts of Central Indiana ).
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As the sand is moved due to winds or is in the process of collapse due to small avalanches, a strong sound is made giving it the name " Singing Sands . " A French team has explained this phenomenon as due to a thin surface coating of slate over the sand grains which causes the sand to make a resonant sound.
