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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