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    Links

a) Links to Other DIY Hydrophones

b) Links to Magazine Articles

c) Links to Material Resources

d) Links to some Hydrophone Applications

Links to Other DIY Hydrophones
1) Dave Goodson provides construction details for a different style of dunking hydrophone at
 http://sonar-fs.lboro.ac.uk/uag/downloads/bender2.pdf
and
http://sonar-fs.lboro.ac.uk/uag/downloads/preamp2.pdf


I built this  hydrophone to Dave's specification, and it certainly works. His circuit diagram allows for the frequency pass-band of the pre-amplifier to be adjusted (by changing certain components),  but involves a TL072 op-amp chip. Like other op-amps, this chip requires a split voltage supply, which is readily achieved in portable equipment, by using a pair of 9 Volt batteries as he suggests. Dave advises that a split supply can be obtained from an isolated 12 Volt supply, by using a simple resistive voltage divider, but I've not tried this yet, and don't know whether the usual grounding of the negative terminal on a boat's 12 Volt system might cause difficulties when the output was connected to other equipment  supplied by the same grounded battery system.

Links to Magazine Articles
An article about my  DIY Hydrophones  has been published in:
Australian Yachting Magazine.
September 2002
Sailing Inland & Offshore
(South Africa) - October 2002
I  ask  people to please respected my copyright, and that of my publishers, and not to make copies of  my magazine articles available on-line.

Links to Material Resources

 Jaycar Electronics  is an Australian firm that can supply electronic components mail -order. There is a list of components for a simple dunking hydrophone, quoting Jaycar  part numbers here

 Sensor Technology Limited is a Canadian firm that can supply hydrophone elements, pre-amps, amplifiers, and off-the-shelf  dunking type hydrophones. I've found them particularly helpful and easy to deal with.

Links to some selected Hydrophone Application Sites

www.seatoskysoundresearch.com is involved with  acoustic surveys of  marine and other environments around the Kwakiutl Territory and Broughton Archipelago in British Columbia.

 

 

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