The Dolphin Speaker is such a clever invention Jacqueline! You have obviously put a lot of work into your fantastic drawing, it really clearly highlights how your invention works to deter dolphins. Accidental danger to dolphins through fishing is a very unfortunate issue, it's amazing that you are thinking about ways to help sea life. It's even more amazing that your solution is to play orca sounds to repel dolphins, this draws on the dolphin's natural environment and instincts, so your invention won't disrupt the natural rhythm of ocean life. This is very advanced and thoughtful work Jacqueline, keep inventing!