Your quacking sounds descriptions take up the majority of your review, yet you didn't look at the frontpage of the BGG entry for this game?
We made an interesting discovery regarding this game. As far as I can tell it's not documented. Assuming the screw hole is up, if you remove the battery on the right you won't get the high pitched electronic quacking sounds. The rest of the game will continue to function as normal and is still quite noisy but much more tolerable.