View Full Version : how ultrasonic waves r emitted?

01-25-2008, 04:28 PM
Do ultrasonic waves emitted by ultrasonic transducer are sharp point of beam in a particular direction or r radiatted in all the directions???

what would be the cost of ultrasonic transducer(40khz)that can detect distance of upto 1m.?????

01-25-2008, 05:05 PM
:evil: :evil:
DO NOT post multiple!!!

Ultrasonic waves are simple "sound" waves.. They just have a higher frequency.

Of course you can "point" them to a particular direction - using tubes.
Google for "pencil beam"