Does HD radio broadcast replace the conventional analog broadcast?

radio broadcast (a broadcast via radio)

Broadcast radio is one-way radio, meant for commercial purposes.

All HD broadcasts are digital. Not all digital broadcasts are HD. "Digital" is simply a way of coding TV pictures onto a radio wave so that your TV can receive the radio wave and turn it back into...

any time objects resonate with a radio signal's frequency you have the makings of a crude radio. If those objects react in a way that allow the changes of the radio signal to make noise, you'll hear...

from transmitter through air molecules in the form of waves