"Jeff Liebermann" wrote in message
...
I'll make it really simple for you. FM is "hi-fi", while AM is noisy
"no-fi". Don't you want to be cool strutting down the street with
your iPhone watching HDTV with 7.1 sound? It wouldn't do to have it
sound like the typical AM broadcast station. For decent quality, you
gotta have FM.

FM is not inherently any more 'hi-fi' than AM. Fidelity is a product of
bandwidth, not modulation type. AM is not even so susceptible to noise as
the frequency goes up, since the energy of the noise pulses goes down
logarithmically as frequency goes up. AM is used for aeronautical
communications very successfully for several reasons, one of which is the
LACK of 'capture effect'. There are still some frequencies where AM will be
more susceptible to interference than FM, but FM would still suffer, for
instance the segment between 1330-1400 MHz which is the natural frequency of
Hydrogen (lots of that around).