Acoustic dissociation of water - Keely, 42.8khz.
Is anyone working in this field?
I notice that the cost of ~40khz transmitters, and their amplifiers has tumbled recently. A snag is that the tuning of the amp to the critical frequency is not that straightforward. It can be a matter of looking at the circuit board, working out how it works and replacing certain fixed components with either a variable one or an additional circuit.
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