A layer of tiny grains can slow sound waves

[unable to retrieve full-text content]Researchers say the findings could lead to a new way of controlling frequencies in electronic devices such as cellphones, but with components that are only a fraction the size of those currently used for that function. On a larger scale, it could lead to new types of blast-shielding material for use in combat or by public-safety personnel or equipment.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_technology/~3/1xXomFiluKc/130806132936.htm

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