Disorder helps to 'hyperfocus' waves in time reversal acoustics

For every burst of sound, there must exist a sound that bursts in reverse, according to the theory of time reversal acoustics. From their discoveries of some surprising characteristics of mediums and frequencies, scientists have gained insight into acoustic time reversal, which could impact applications such as sending confidential messages in cryptography.

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<p><a href="http://www.physorg.com/news12093.html">Disorder helps to 'hyperfocus' waves in time reversal acoustics</a></p> <p>For every burst of sound, there must exist a sound that bursts in reverse, according to the theory of time reversal acoustics. From their discoveries of some surprising characteristics of mediums and frequencies, scientists have gained insight into acoustic time reversal, which could impact applications such as sending confidential messages in cryptography.</p>