Back in high school I played the trumpet for 6 months, and then clarinet for the next 4.5 years (high school is odd in Quebec, and it's not important to the question anyway), and I was a science student, so I have a decent idea of how a wind instrument makes different tones.
Recently I got a chance to see one of my favourite bands (SOIL & "PIMP" SESSIONS) live for the first time and noticed something about one member's trumpet: it had a sort of webbing in the 2 big bends, like on a duck's foot.
My question is how would it affect the sound? Would the additional stability prevent the pipes from vibrating and altering the vibration of the air flowing inside? Or would they maybe send the vibration to the rest of the tube? (though that would likely also have the same effect)
This is the trumpet of that player: