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