I want an inexpensive way to connect a hydrophone to a
...
card. I will then write the software to read the
audio-in port. I want to read frequencies between 1 Hz
and 100 kHz and use my own software to read the input
..
Does this make sense?
...
<
No, it doesn't make sense.
The ordinary built-in soundcard in a laptop is low quality and doesn't have a
frequency range like the one you mention.
Neither will the signal/noise level make you happy.
There will be a kind of impedance mismatch between the hydrophone and the
microphone preamplifier, which will degrade the S/N further.
If you can accept a flat frequency range 20 Hz - 40 kHz, and can accept to
use a mic preamp instead of a real hydrophone preamp, you might find Core
Sound's Mic2496 interesting. (From the sales blurb: Mic2496 is a handheld
24-bit/96 KS/s dual mic pre-amp and A-to-D converter that runs on a single
9 Volt battery, provides 48 Volt phantom power and offers very fine sound
and very low noise. It's a great front end for our PDAudio high resolution
recording system. We're proud to say that there's nothing else like it in
the world! It's available now for $499! ) The web-site is
www.core-sound.com.
mvh
Anders Heerfordt
CSC
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