100w 28khz Diy Ultrasonic Transducer For Home Made Ultrasonic Cleaning Tank - Ultrasonic Cleaner Parts - AliExpress
How could I make a cheap ultrasonic transducer? - Quora
The most simple ultrasonic piezo driving circuit - Arduino friendly - YouTube
How To - DIY ultrasonic rangefinder - Make:
15k 3000w High Frequency Small Homemade Ultrasonic Transducer - Buy High Power Ultrasonic Transducer,Small Ultrasonic Transducer,Homemade Ultrasonic Transducer Product on Alibaba.com