hi guys... i am making an autonomus underwater vehicle whicle can detect voice of 22khz frequency . and respond accordingly.i completed all my codes and all but for testing code i want some source of 22khz frequency in water. so i brought 4330B. but i am unable to work with this .suggest some way by which i can produce 22khz sound with the help of this pinger.or suggest some other way by which i can produce 22khz frequency in water. thanks in advance..
