Now who is laughing?

Hmmm, send it back to R&D. The expelled gasses going directly into the horn would only produce a single-toned "HONK". Instead, those gasses could be used to inflate a cuff that's wrapped around a more traditional style clown horn bulb, squeezing the bulb and producing that same noise; but as the cuff loses pressure and bulb reinflates, the air it draws back will produce second tone, providing the clown horn's signature "HEE-HAW" that our prospective murder victims expect and deserve.

You could skip a lot of effort by just using g a rubber chicken
- Yes but direct gas impingement on a rubber chicken is going to wear some parts. Better to have an indirect system and avoid carbon deposits in your comedy noisemakers.
- Permanently Deleted
- Smithers, have old man Gower killed

I could totally see this in the next Borderlands game.

Bullets are faster than sound. So it might be bang, splat, toot.

subsonic ammo is a thing, esp. for suppressed firearms - that way you never get a crack, and only hear the mechanical action of the assemblies reciprocating.
- Noted, clown horn might counteract my suppressor.
- .45 acp default rounds is subsonic
Which is exactly in line with the meme.

this idea is going straight to space station 13, I'm sure

Hey, a fellow space station player in the wild! Please God don't let the station clown get this, he already tied me up in the library so I have to watch his nonsense.
I've played like 2 games of it and have no idea wtf is going on, any tips?
- I've played like 60 games and barely have any idea wtf is going on, good luck lmao
  
  My advice is to pick something relatively low impact like janitor or bartender if it's available and just try and hang out and see what happens. Or just be an assistant but people tend to ignore you or grief you if you're assistant. Some of the more complex roles, if you're interested in trying them, such as engineering or botany, are greatly benefited by figuring out how to host a private server to log on to and practice outside of a real game. Medical, at least as of a couple years ago when I last played, is pretty formulaic and as long as you know what operation you need to perform and have the supplies to do it, you can just follow a wiki page recipe.
  
  Don't trust sec, don't trust the clown, if anyone outside of your departnent is being exceptionally nice to you they're probably going to stuff your corpse in a locker 20 minutes from now if you don't help them kidnap HoP. Learn to be robust. Rules (both social, and actual game rules and code) will differ, sometimes greatly, depending what server you're currently on, but reading the Goonstation wiki should give you approximate knowledge of most things.
  
  If you roll antagonist, God be with you, and know that we've all royally bungled many an antag objective, most especially when new. Just try to have as much fun as you can, the points don't matter anyway.
- make friends and survive :3

Not a bad idea, people will just think its a crackhead clown walking down the street shooting people. No reason to call the cops then.

Please tell me there is a youtube video out there building this.

OP’s post
- Amazing. Thanks. Seems like you could divert most of the air into a secondary silencer chamber. That way only a "small" amount of air interacts with the reed. I'm not a gun guy though. I'm more here for the clown noises.

It's a clown gun. It has thousands of clown bullets inside and are commonly used in action movies due to how the bullets are many and non-lethal however they edit out the honking.