Thermoacoustic generators.
Work on relatively low temperature differentials to produce sound which is 
then converted to electricity with piezoelectric material.

Various new developments by a number of PhD students.

Sounds promising.
:-)


        Russell

----- Original Message ----- 
From: Matthew McMahon
To: Russell McMahon ; matt@macas.id.au
Sent: Tuesday, June 05, 2007 2:57 PM
Subject: ScienceDaily: A Sound Way To Turn Heat Into Electricity


http://www.sciencedaily.com/releases/2007/06/070603225026.htm
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