R rofilm Member Sep 9, 2018 #1 I´ve started some experiments with (cheap) DIY hydrophones (making, comparing their sound etc.). There will be more about (under-) water sounds later. Enjoy your day! Rolf
I´ve started some experiments with (cheap) DIY hydrophones (making, comparing their sound etc.). There will be more about (under-) water sounds later. Enjoy your day! Rolf