Typically, a device sends an ultrasonic pulse from the top of a pole to the ground.

The bat will detect its ID and send out an ultrasonic pulse.

The ultrasonic pulses work through all kinds of low-visibility situations, and they are also helpful in the blind spot.

Essentially ultrasonic pulses are timed as transmitted from the stylus and received at two points on the receiver.

A second question is whether one can create an ultrasonic pulse that is approximately monophasic.

The ultrasonic pulse (or pulses) would then push the potential past threshold.

An ultrasonic pulse is generated in a particular direction.

This receiver is basically a microphone listening to the ultrasonic pulse.

He peered quickly into the room from which the ultrasonic pulse had come.

The copilot watched the scope intently as the ultrasonic pulses went ranging out in all directions.