2000W High Power Ultrasonic Sound Generator / Ultrasonic Cleaner Generator 20-40kHz - China Ultrasonic Generator, High Power Ultrasonic Generator | Made-in-China.com
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ultrasonic sound generator (3-4 W) with tweeter (schematic) - YouTube
An ultrasonic sound generator generates a wave of wavelength 1.6 cm and frequency 22 kHz.ii. A plane uses this generator to measure the altitude. It receives the reflected signal 8 seconds later.