is used throughout the Whale Watching industry around
the world. Boat operators connect DolphinEar to their
existing speaker systems so that passengers can hear
whale, dolphins and other sounds. Here's an extract
from one such whale watching tour operator in the US:
a DolphinEar hydrophone to replace another more expensive
one that we used occasionally. I say occasionally because
it was difficult to set up and use. I ordered the DolphinEar
when the old hydrophone gave up the ghost. But since
it cost only about a fifth of the old one, I really
didn't expect much.
tell you how surprised we were when the DolphinEar arrived.
It is much more sensitive and so much easier to use.
We are using it on every trip now (instead of just occasionally)
and play back the sounds through our speakers. There's
no set up we just toss the hydrophone over the side
and turn it on.
it's particularly useful when the sea conditions make
sighting whales difficult. Our guests can hear them
even if they can't see them. That makes our job easier.
cut the engines and just drift and listen a the whales
and dolphins go about their business. It's a much gentler
way of doing whale watching and our guests come away
with a better appreciation of the ocean environment.
made some recordings which we use to sign up customers
at one of the local hotels and of course at the dock."
/ Dan T. - Washington State
purchased on of your DolphinEars. It is performing perfectly.
We have a small charter boat and play whale sounds for
our passengers to hear."
/ Bob M. - Queensland
recently bought the DolphinEar and used it for rockpooling
along the UK coast. I have been surprised at its sensitivity.
In the past I have given short demonstrations with my
other hydrophone which is a commercial one, using a
tape recorder as an amplifier and two small loudspeakers
to show what can be heard underwater. I find that that
faint sounds the DolphinEar picks up would be lost if
played through the my existing set-up.
is to introduce this fascinating side of rockpooling
to young people. I started underwater recording about
five years ago making my own hydrophones but not successfully.
Last year I was asked to help a student put on a public
demonstration of underwater sounds. I would provide
the equipment to record the sound and he would then
analyse the sounds on his computerised equipment at
the Information Centre afterwards. This worked well
and I recorded the sounds made by limpets and prawns/shrimps.
The limpets can be heard rasping the plantlife from
the rocks and the prawns/shrimps can be heard clicking.
There have been other noises as well but need further
is far more versatile than the other hydrophone I used.
I gave a demonstration at the national aquarium a few
days ago and its director was most impressed. He wants
to use DolphinEar at various places in the aquarium
so that visitors can listen."
/ Bryan V. (UK)
we use nets to protect our beaches from sharks. But,
we don't want to entangle dolphins in the nets so we
use underwater 'pingers' to alert them of the danger.
Government agency we have a requirement to ensure that
the pingers are working at all times. The officers run
along side the nets in a outboard boat and use DolphinEar
to listen and check that the pingers are working using
the headphones. The pinger are usually 3 to 6 meter
below the sea surface. The inspecting patrol boat is
3 to 10 meter from the net."
/ B.L. - Australia
Listening to DOLPHINS!
why I wanted DolphinEar...
weeks ago while cruising the waters between Long Beach
harbor and Catalina Island here in Southern California,
I ran into a mega-pod of Pacific Dolphin... there had
to be several thousand dolphin in a 1/2 mile square
area. We played with them for three hours... they willingly
and competitively surfed the wake generated by my boat,
and lead us around as if they were teaching US how to
play in the salt water. We could hear their sounds and
feel the spray when they came up for air... but I didn't
have anything to record their voices.
find anything on hydrophones, so I started gathering
up parts to make one. I purchased a Karoke machine (because
it had an amplifier, mike, speaker, and tape decks to
record the sounds). Then I purchased a professional
microphone with extra length of cable, some 1 inch clear
tubing, some waterproof tape, a trailer hitch ball (to
sink the whole contraption), and a ready-made cylindrical
latex sheath to protect the mike from saltwater exposure...
you can probably guess what the latex cylindrical device
was...I got it from the Drug Store... rear shelves.
we made our own equipment... and THEN I found the DolphinEar.
Now I won't have to worry about the water destroying
the microphone with some strange marine virus.
tell that I'm excited to get my hands on the DolphinEar?"
/ Bill Y. - Califoria
From Fish Ponds to Swimming Pools:
IN A FISH
my DolphinEar today. I just tried it out in my fish
pond (sad I know) and was amazed to hear the carp feeding.
The food that I feed my carp are little balls like biscuits,
in fact when you hear them it is just like someone chomping
away on a biscuit. I cannot wait to take it out on my
/ Steve C. - UK
use for DolphinEar is to monitor my SWIMMING POOL!!"
/ Gary L. - California
This weekend I used the
hydrophone with 4th and 5th grade children (ages 9-11)
with appreciable success. Some even drew the hydrophone
and depicted the snapping shrimp below in their art
projects. Underwater sound transmittance is also
a good lesson as we differentiated a twin 45HP outboard
motor 2.5 miles away in 56 degree (F) water.
/ Brian P.. - California
SUM IT UP ...
/ Lin R. - Maylasia
it! Everyone should have one! I'll be sending some sound
samples for your website!"
/ Jason H. - Hawaii