"daffy" wrote in message
oups.com...
The Bay Area has more small plane traffic this week.
I notice more out of state "N" numbers on those planes
flying, creating more NOISE.

Noise is not "created", it's "produced".

Matter and Energy cannot be created or destroyed. Sound is a form of energy,
simply converted from another form of energy.

I don't remember the exact definition of noise, vs sound, but the sound made
by small aircraft is more like music than noise to me.