Thanks for reading my post. I would like to produce 23KHz ultrasound at a presure of 70 to 100 dB. I am thinking that I will need a device to create the 23KHz signal, an amplifier, and either a transducer or a piezo-buzzer. I'm looking for a point in the right direction. Are there any off the shelf components that would make this easy? What sort of signal would be best for driving the output device? (sine, saw-tooth, square, etc.) Thanks again.