On the Blog of the site :
http://jdc-meteorite.e-monsite.com/b...perseides.html
The radar of the U.S. Air Force Space Surveillance recorded the echoes from the meteor shower of the Perseids passing this device:
http://www.youtube.com/watch?v=np_HpBAlEmY
You will hear a type of "clash" with the mesosphere, then a few seconds of "drag" during which the meteor disintegrates.