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Acoustic radar using a computer speaker and a microphone

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cowboy3

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I found this article on how to build an acoustic radar using a computer speaker and a microphone. It uses a sound card for data acquisition and Labview for the real time display. They talk about the possibility of using Matlab or Octave though.

Click Here for Article

 

An acoustic radar uses any loudspeaker to emit sound pulses toward a target. A microphone or the same speaker then receives the return. You can use any oscilloscope to experiment with it.
Any handheld "ultrasonic" distance meter operates the same way. To use a miniature sound emitter, ultrasonic devices have a diameter of ~ 2 cm, and the meter can measure distance to targets (walls, windows) up to ~ 15 meters.
I have no schematic available but in one old design a triggered counter was used to measure the interval between the sent pulse and echo in ~ 10-cm steps. Now you can program your computer to do the same.
 

It would seem you can. I read the article and it seems simple enough.
 

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