The ‘sound’ a popper makes is extremely important to the fisherman.
We can’t ‘hear’ the vibrations caused by our creations like the fish can. We can only ‘hear’ the sound that it makes on the water. The difference in sound that we can actually ‘hear’ gives us a clue as to what the fish ‘feels/hears’ with it’s lateral line and it’s ‘ears’ (separate things in bass). If it ‘sounds’ different to us, then the sounds/vibrations it puts off in the water are also different.
Some misconceptions seem to be universal about foam poppers. They are significantly heavier than balsa, even though most tyers seem to think they are lighter. Balsa makes the lightest baits I’ve found, but’s that not to say they are superior. Cork varies wildly as to it’s weight. Especially now that the ‘good’ cork we used to be able to get has all but disapeared. If you take the time to weigh a group of cork bodies, you can find as much as a 30 percent difference between them.
The type of paint/finish you use, and the number of coats, can add significant weight to a popper body. Cork often needs lots of paint coats to smooth it out, so that adds to their weight.
The way a popper ‘pops’ is based more on the shape of the front of the head than on the material used. You can make a bait more agressive (louder, move more water), by how you shape the head. A deeper cupping, different curves to the profile, and how you tail the bait can all change the ‘sound’ it makes.
You need to understand how you will be working the bait and tailor the shape to your fishing style. Do you work the bug by pulling on the line? Or do you work it with the rod tip? Do you want it to spit water, or make loud pop, glug, or ‘swoosh’? You can get any type of popper body material, even deer hair, to do anything you want it to if you shape it and work it correctly.
I like foam because it’s fast and easy to turn out effective bodies in a short time. I like to spin/stack deer hair because it’s an art form and the flies are fun to make and fish. Balsa is a neat material and I enjoy making poppers from it. (I’ve given up on cork because the good stuff costs too much and it’s a pain to work with.) All of the materials we make poppers from catch fish.
But as far as the sound of a popper is concerend, if it doesn’t sound ‘right’ to you, throw it away and use one that sounds like you want it to. Fishing time is too precious to watse on something you don’t have confidence in.
Confidence is the most effective tool you have.
Buddy