5 Jun
2013
5 Jun
'13
12:16 p.m.
On 06/04/2013 04:53 PM, Tony Duell wrote:
Yes, but the principles (as I stated) are mostly identical.
I depends at waht level you are working. The basic idea -- send out a
sound pluse and see how long it takes to get back -- is of course the
same. So is the idea of using the same transducer for transmit and
receive. But any lower-level details are leikely to be different.
-tony
http://www.neurotica.com/misc/polaroid_sonar.jpg
The principles behind sonar depth sounders are mostly identical.
Be cafeful. The Polaroid transducer is electrostatic. There's a thin
diaphragm and a back electorde, it woks like an electrostatic
speaker/condenser microphone (as we called them). Most, if not all,
marine depth sounders are piezoelectrice (work like a crystal
speaker/microphone). The drive chracteristics are rather diffierent. 