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Re: hydrophone

Subject: Re: hydrophone
From: "Yannick Dauby" yannickdauby
Date: Mon May 14, 2007 2:55 am ((PDT))
Hello Kim

Thanks for the advice !
But in fact I played a lot with piezoceramic transducers, but using them 
as hydrophone, I never got enough gain to records other things that 
strong waterstreams.
As Derek told us several times, the keypoint with piezo is impedance 
matching, but I am still wondering about how to make it...
The LAB40 is said to have it.
(I forgot to give antoher url : 
http://www.whaleresearch.com/thecenter/OrcaSound01.html )

By the way I use since a few years a very simple hydrophone made with an 
electronic component that I can't identify. I found it in a throat 
microphone, and just covered it with glue.
Here is a small page about it : http://www.kalerne.net/waterbugs/index.html
There are my experiments using this component and a stethoscope in order 
to record Sigara dorsalis (sorry, I don't know the english name of this 
aquatic beetle).

Friendly yours,

Yannick

ps : Oops, sorry the webpage is in French, but the I wrote nothing more 
that what explained above...

-- 

www.kalerne.net
www.yannickdauby.net






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