Thread: kick arse suppresor ?

Originally Posted by Hunter_Nick

Interesting, because air density has virtually nil effect on the speed of sound. Temperature is the condition that has most affect.

Yes, but temperature drops as altitude increases, so there is an indirect effect of altitude.
I read something in a hunting or tramping book years back that stuck in my brain - if I recall correctly, it said temperature drops 6.5 degrees for a 1000m increase in altitude, meaning the temp at the treeline is roughly 8 degrees lower than at sea level, all else being equal.