Is anyone aware of an application that has used ultrasonic sound waves as a communication link? I'd like to send one byte of data a distance of 25 meters.
Don't know of any application, but it would seem possible. Some of these ultrasonic transducers, for example, claim an operating distance of over 100'.
I've found this one so far. It suggests using an ultrasonic send to a remote receiver. The receiver then pulses a light back to the sender. Distance measurement uses speed of sound and speed of light.
I've found this one so far. It suggests using an ultrasonic send to a remote receiver. The receiver then pulses a light back to the sender. Distance measurement uses speed of sound and speed of light.