{HEAD ~ The second relationship} developed by Weinreich as described in {TAIL ~ Ultrasonic Attenuation} by Free Carriers in Germanium Physical Review, 107, page 317 results in an electric field proportional to the acoustic energy lost to the free charge carriers 
as described in
{ HEAD ~ The second relationship } developed by Weinreich as described in { TAIL ~ Ultrasonic Attenuation } by Free Carriers in Germanium Physical Review , 107 , page 317 results in an electric field proportional to the acoustic energy lost to the free charge carriers
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