A guy made the comment on another more local BB, he thought a cork bodied popper made a "better" sound than a foam bodied popper. Honestly, I have had the same thought myself. But after pondering a bit and thinking about sound transmission, vibrations etc and seeing a video shot from beneath a popper in a bathtub I came to the conclusion the fish don't hear the sound, they see the wave action around the popper and may feel the vibration in the water but sound isn't really something that affects fish very much.

What are your thoughts on this?