"David Eduardo" wrote in message
. net...

"Frank Dresser" wrote in message
...

"David Eduardo" wrote in message

I'm not clear on what I'm wrong about. Doesn't FM also lose most of
their
listeners, in absolute numbers (not percentage) during the night? What
are
those numbers?

The difference is that FM actually increases share of available listeners
at
night, while AM decreases. All radio has different listening levels at
differnt times. From 6 Am to 7 PM, it is around 22%, while at night it is
more like 7%... keeping in mind that 7 PM is "daytime level" and 11 PM
most
people are asleep and it is around 3% of the universe.

Whaterver the listening level, FM takes more of it at night.



Yes, proprotionally, but I'm interested in how many listeners AM might keep
if they went to IBOC at night. That's what I meant with "absolute numbers".

A further speculative comparision would concern the total number of
listeners with and without IBOC. And not the total for any given station,
but the total for the radio industry. After all, if IBOC doesn't draw a
larger number of dollars from the advertisers, it's expenses will be a loss.

Frank Dresser