I'd guess that it boils down to the internal volume, more air volume = less noise.
but I'd go for longer & thinner because the air is traveling towards the exit hole so the more length to divert it, the better.
I'd guess that it boils down to the internal volume, more air volume = less noise.
but I'd go for longer & thinner because the air is traveling towards the exit hole so the more length to divert it, the better.