with the surface areas being both the same would a saugage shape or globe shaped balloon give the loudest bang

Answer 1

A globe shaped balloon would have the larger volume for same suface area and thus would hold more air and would probably give a better bang

Answer 2

A sphere holds the maximum pressure under the greatest strain for the material. This sausage will have less air under pressure so the energy available will be less. Further, when the sphere is broken, all the forces are balanced, releasing them all at once, while with the sausage, much of the force goes into spreading the tear and moving the sausage.
Empirically: a moderate balloon, inflated makes much more noise that one of those balloons used for making balloon animals which go with barely a whimper.

Answer 3

I tried a blind trial, recording the sound of both sausage and 'round' ballons (only 10 of each so don't know how significant it was) then got two little girls to listen and see which 5 they thought were the loudest - result => 3 round and two sausagey in one list : 4 round and 1 sausagey in the other.

I burst the ballons by sitting on them on a wooden chair at about 8 feet distance from the mic. There was quite a variation in size but they were all about as close to bursting as I could get before I tied them off.

Best of Luck - Mike

Answer 4

can't answer...

Depends on air pressure in the balloons... and the thickness of the rubber and how it was popped...

And how 'sausage shaped" is "Sausage shaped"? and how round is round (because no balloon is really round...)

Generally with party balloons, there won't be enough difference in sound to be able to detect it.... they tend to have the same thickness latex and the same pressure.