Sparkling gourami noise

Hey, I'm just wondering if anyone has experience with keeping sparkling gouramis. I'm curious as to how often/loud the croaking noise they make is as I'd like to keep a solo fish in my bedroom but I'd also like to be able to sleep (the hum from a small air pump is usually enough to keep me from doing so). Do they only make it when there are females around for them to mate with or is it more of an occasional thing like when pea puffers puff up?

Likely, they won't croak at all without a mate or rival. They might make some noise during feeding time.

The croaks are anyway pretty quiet, a bit louder of a small air pump, but it shouldn't keep you up as they likely won't croak at night

Hi I agree with cyberfish, likely you won't hear (or see very much of) a lone sparkler.
When they do chatter it's low, in short bursts and not consistent or constant. It makes me smile rather than bothered.

I don't think I'd suggest keeping a loner. They can be pretty shy

I had a group of three a few years ago who didn't croak at all.

I recently had a pair who turned out to be m/f and a mates pair, and the male did croak. I moved them to their own tank, where the male still croaks now and again, although I haven't witnessed egg production.

but two fry survived in the community tank I moved the pair from (chilli rasbora and a couple of dwarf species of kuhlis loach that I can't catch out), both of which are male, one of which croaks at the other.

You can hear the croaking from outside the tank, but it's actually pretty unobtrusive and easy to miss. It's almost more like a creak? There's some vids online where you can catch the sound.

Mine do it a couple of times in a row and then maybe a couple more a few minutes after and then that's usually it.

I doubt it'd wake you unless you're an unusually light sleeper, I don't think I've heard it at night.

Usually happens around evening when I feed them, sometimes around morning when the lights go on.

I don't think I'd suggest keeping a loner. They can be pretty shy

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I concur. I think usually they do best in small groups at a 1:2 m:f ratio. How big is your tank?

They usually only croak when breeding, showing rivalry, or sometimes during feeding.