On Wed, Nov 23, 2011 at 04:16:36PM +0000, Dave Malham wrote: > There's actually an online calculator here > http://www.csgnetwork.com/atmossndabsorbcalc.html and a good paper by > Dennis A. Bohn at www.rane.com/pdf/eespeed.pdf (from JAES 1988). Somehow, > the fact that absorption peaks at low humidities always seems somehow > counter-intuitive - we (or, at least, I) kind of expect sound to be > deadened in a high humidity situation like a fog. I _know_ the > difference is that a fog is water droplets, rather than just humidity, > but it still doesn't _feel_ right.
Thanks for the pointers ! And yes, it seems counter-intuitive. But water vapour has actually lower density than air (at the same temperature), and 'humidity', either absolute or relative, refers only to the presence of water *as a gas* in the air mixture, not to any condensation. Meanwhile the 'nebbia' season has started here... Visibility at around 10m or so most evenings last week, airport closed. Ciao, -- FA Vor uns liegt ein weites Tal, die Sonne scheint - ein Glitzerstrahl. _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
