"Frank Dresser" wrote in message
...
"David Eduardo" wrote in message
news
Since it only affects Am significantly, and does not affect AMs with good
signals, we are talking about very few stations that are otherwise viable
being affected.
I take it that electromagnatic interference from home electronics isn't
significantly reducing the radio audience even though they are listening
to
analog radios.
This one has been proven. A look at ratings from the 70's and even 80's show
listening ZIP codes to include significant listening in those in the 5 mv/m
to 10 mv/m range. Today, in most large cities, the listening is almost
entirely in the 10/mvm or better... in LA, it is mostly in the 15 mv/m, for
example. The difference is not new stations, as most larger markets have had
no new stations in that period, but the difficulty in listening... and
listener expectations of better signals and less noise.