Hi David,
I use a pair of JrF hydrophones, together with two impedance converters to
get a stronger signal out of them when used with my Tascam DR680 recorder.
In terms of placement, I literally just dropped them both in the water at
about 1 to 2 meters distance from each other, and kept moving them around
whilst monitoring until i found spots with the most interesting sonic
activity. I've also only had varying degrees of success with hydrophones
myself. Whenever I did get to record a lot of underwater/insect activity it
was usually in quite muddy or dirty looking ponds, and in the case of these
recordings there were a lot of reeds and plants in the water, so that might
have contributed as well (as well as time of year of course).
On the topic of hydrophones, I just heard about this article on the BBC
about newly discovered songs of bowhead whales, and how scientists now have
hydrophones monitoring under the arctic ice caps all year round:
http://www.bbc.com/earth/story/20150108-unique-whale-songs-discovered
On Wed, Jan 14, 2015 at 12:19 AM, [naturerecordists] <
> wrote:
>
>
>
> > <
> http://daanhendriks.co.uk/wildlife-nature-sound-recording/hydrophone-reco=
rdings-farting-plants-screeching-beetles/
> >
> > about
> > using hydrophones to record "the sound of photosynthesis"
>
> You wrote: "There=E2=80=99s a few more later on as well, making it seem a=
s if this
> beetle clearly had something to say, but god knows what.
>
> Daan,
>
> How about "Heads up lads - there's someone listening in to us!" :-)
>
> I enjoyed your recordings. Nice to have underwater stereo.
>
> I haven't had much success myself underwater so far. What hydrophones did
> you use and how were they placed?
>
> David Brinicombe
>
>
>
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