Warning, thread hijack. Warren, what noise does your airlock make?
We can develop lots of theories about airlock noises, and the reasons behind the different noises.
Then we can discuss what people from different language backgrounds call that special noise.
Then we can debate open versus closed fermentation, and the old favourite, gladwrap with a pinhole.
My favourite airlocks are the two part airlocks, with only a small bit of fluid in them they provide very little backpressure to the fermenter and are almost silent in operation. They also do not allow fluid to be drawn back into the fermenter when you lift the fermenter up. And you can pull them apart and clean them.
Back to listening to the gloomping.