This is why you could hear the astronauts on the moon hammer in the flag, and they can communicate by touching their helmets together (stop sniggering at the back).
When you fart sitting on a chair the sound doesn't travel, lift of the seat a little bit and it's much louder and travels further. solids damper the sound.
Decided not to come on this thread over the weekend so I'd be able to respond to the posts after people had calmed down from the defeat; only to find the thread has descended into 2 pages of discussion about farts. Wouldn't get this level of entertainment and maturity on any other forum!