Andrew Bray : Listening to sounds coming out of the ocean sometimes adds a truly wonderful extra dimension to my sailing.
The simplest types of hydrophones are only suitable for dunking over the side of a slow moving or stationary boat. Hydrophones can also be housed to make them suitable for towing behind a moving boat, especially sailing boats which have no engine noise to contend with.
These pages provide information for DIY construction of both dunking and towing hydrophones, and some sample underwater sounds.
I like hydrophones, next to etherphones (aka: low frequency recievers) which recieve audio from the aurora borealis.
Comment from Clyde Lofton Jr. — September 30, 2008 om 2:30 am