[FISH11]

When the engine was not running, the noise transmitted through the hull and picked up by the gopros in the water proof cases I think was the bass off the music playing through my Ecogear water proof speaker. Just like a kayak the inside of the hull become a giant sound box, that can be heard underwater. It has never been a problem in scaring fish, but I do try to keep the volume down some. I noticed that also, it is more pronounced then when I used it on my other kayaks. I might switch over to bluetooth earbuds.