1.   Next, an ultrasonic device called a duplex scanner can create a computer picture of the inside of the artery, indicating the degree of blockage.

2.   The project robot consists of a mobile platform equipped with infrared sensors and an ultrasonic ranging device that help it navigate.

3.   The ultrasonic device is housed in a compartment the shape of home plate, which the device replaces.

4.   Ultrasonic devices are advertised as being effective in cockroach control, but they will not drive roaches from the house.