well, I have to see I do feel rather chuffed that JrF hydrophones are being used on Planet Earth II with Attenborough & have been used to identify & record, for the first time, a new species of river dolphin !
50 minutes in on BBC iplayer:
http://www.bbc.co.uk/iplayer/episode/b083wt7z/planet-earth-ii-3-jungles
