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The acousto-optic effect is extensively used in the measurement and study of ultrasonic waves.

On the ceiling was a small half hemisphere that, when activated, projected ultrasonic waves throughout the area.

In this way, it works as a receiver of ultrasonic waves.

The ultrasonic waves from the generator interfere with the normal air flow.

I'll have to find some way to keep those ultrasonic waves from being transmitted through the whole air frame.

The inverse piezoelectric effect is used in production of ultrasonic sound waves.

At best, ultrasonic waves have only a partial or temporary effect on rodents.

Another use is to produce pictures of an unborn baby by reflecting ultrasonic waves off its body.

Liposuction techniques using ultrasonic waves were developed in the 1980s.

"Unless I miss my guess, they're beaming a type of ultrasonic wave at us!"