KVML : The Clark Howard Radio Show talks about the Portable PeopleMeter [PPM] and TV & Radio Ratings
 

Today on KVML-AM 1450 kHz Sonora, CA
http://www.kvmlam.com/index.php

the Clark Howard Radio Show got a question from
http://clarkhoward.com/
http://en.wikipedia.org/wiki/Clark_Howard

a caller about the Portable People Meter [PPM]
and TV & Radio Rating systems.
http://www.arbitron.com/portable_people_meters/home.htm

Clark Howard did an OK job of explaining it
to the caller ~ RHF
http://www.kvmlam.com/airstaff.php