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@elfin
damnit!
burning brain cycles on this

ok

the gas we call air, is elastic,
'sound' waves are, well, , waves

of air, abt 20% is o2
it's the o2 we care about here

we can pull the o2 density 'down' with sound,but of course it comes right back peaking at the inverse pressure concentration from the trough

so
is there a reasonate freq for o2?
sure
do we care?
I think so
70-ish% is N
we mite care more about that,
*but*N has an affinity for o2

Gaaah!

Interesting Q
Geee, thanx a *lot*