Will a brass instrument with multiple bells be louder?

Question

I'm not an acoustic engineer (though this makes me wish I was. . .)

To my knowledge, the mouthpiece is the real instrument. Then, the length of the tubing and its diamete determines the range, and the flare and bell increase volume.

I intend to build a cheap, prototypical, low pitched, LOUD brass thing to make some noise at some football games. So I plan on getting brass tubing, some sort of funnel, etc. to make this goofy looking contraption. However, I was wondering something.

If you were to put an adapter on the end of the tubing that would allow you to hook up another bell, would this make it louder? Is it similar to hooking up another speaker to an amplifier? Or am I just completely daft?

I presume it's the latter.

Thanks for any and all help guys!

Answer 1

I think it would depend on the shape and bore of the bells.  If you had a very restrictive bell like on a Trumpet a second bell might allow the sound to flow out better.    But if you had two huge bells like tuba bells the sound would not be much louder than one bell... the large bore would allow the sound out freely using just one bell.   Anyway.. I can show you how to put your instrument together... watch my video below:

Answer 2

My private teacher has a three belled trumpet

it's not any louder

it just allows people on the side of you to hear you instead of just in front

Answer 3

yes actually the sound would be louder because its more people so think of like a car or a train that is more than one

Answer 4

Interesting idea! I was at a Jazz concert some years ago when trumpet player Bobby Shew displayed and played a two bell trumpet! It didn't seem to have louder volume than one bell horn. Maybe you might try contacting Bobby Shew about his two bell trumpet.Good Luck!