Quote:
Originally Posted by Sven  Maybe a silly idea?
Sometimes when there are to less reffs you see reffs with a simple tube with metal pieces in it. When shaking it gives a sound signal.
THat is maybe also possible with a electronic way. Same principe as sending a signal to some outside signal tube or bell only a little bit smaller. So you have no problems at first with sending a signal. |
No, it's not a silly idea at all... I found some papers/projects about using sound waves as carrier for transmitting data underwater... It might work, I need to do a research about which devices can be used as emitters/receivers, I don't know if they are easy/cheap enough...