Russell McMahon email (remove spam text)
Like this ? Frequency given.
Professional underwater voice comms. No details
Speech on 33 kHz carrier
Reference only. Sounds hopeful.
Voegeli, Frederick A., et al. 2001. Ultrasonic telemetry, tracking
and automated monitoring technology for sharks. Environ. Biol. Fishes
60(1-3):267-281. REPRINT FILE.
> I noticed Doug Butler's mention of experience with sonar, and was
> if he or anyone with similar experience could point me in the right
> direction with a personal project.
> I would like to be able to send and receive serial data underwater. I at
> time built hydrophones with small piezo elements that would listen to
> underwater sounds and then transmit the recived data via RF from a
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