Sound to Heat
Name: Lalitha C.
Physics- Pertaining to Noise Temperature...
My question is "Can sound be a useful source of heat energy?"
Specifically, is there a physical way to concentrate and collect heat
produced from different frequencies so it's significant enough to measure
on instruments readily available in physics labs? Also, is the noise temp.
formula [P= k(Boltzmann constant)T(system temperature)(change in
v)=k(T(receiver temp)+ T'a(antenna temperature)], an accurate way to
mathematically prove my question?
Sound with frequencies above the hearing threshold (ultrasonic) is used in
physical therapy to give "deep heat" treatments to muscles etc. Also
ultrasonic frequencies can produce "cavitation" in liquids which cause the
liquid to form superheated vapor which then collapses explosively. Under the
proper conditions temperatures of thousands of degrees can be achieved for
short periods of time and in small volumes.
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Update: June 2012