Perhaps this explains why the total reported shares in many markets only add up to 65 percent, 70 percent or perhaps 75 percent of total reported listening?
Here is Los Angeles as an example:
First, the huge percentage of the "missing" shares come from non-subscribed stations. Each of those has some share... often significant. In LA, the EMF station is not subscribed and apparently accounts for nearly two shares by itself.
Another percentage comes from stations and their streams with less than 0.1 of share... but if you have 50 to 100 or more of those you end up with quite a few share points.
A further percentage comes from stations that are not home to the market, such as Ventura, Riverside/San Bernardino or San Diego stations that are well listened to on in the northwestern, eastern and southern parts of the LA market.
In August, 42 stations showed up with 0.1 or more in the LA book, but there were a over a dozen that were not subscribed and did not show in the public release numbers.
For example,
LA has 192 "stations" that are home to the market... including all of the above. So if you add the public release numbers which are just subscribers, you miss all those non-subscribers along with the out of market signals and the tiny stations that don't even get 0.1 in the subscriber data.
The tutorial is basically telling diary keepers to record satellite radio and internet audio listening! I suspect share data is NOT adjusted to remove such listening from share percentage calculations.
Your suspicion is not correct.
That's because Nielsen does separate reports for other media. The PPM is going to record streams, satellite and TV as well... anything that has audio. The radio report shows AM, FM, streams of AM and FM, and HD channels of FM stations as well as translators, educational stations, etc. At some point, the PPM will cover every medium that has encodable audio.