[BC] Arbitron

[mrfixit at min.midco.net]

Quoting a couple of the responses:

> With the PPM, if the listening device doesn't "hear" you, you have no
> chance of appearing in the results.

> Since PPM replaces diaries in the ratings world, gone is listener RECALL.

I have to surmise that a "gadget" is sent out to randomly selected  
folks, and the data that apparently is encoded into the various radio  
stations is logged along with date/time stamping, etc.

Now the comments about the importance of the encoders make more sense.

thanks,

Dave Dunsmoor