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Home › Magazines › 2008 › September › Ultrasonic Sound Detector

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Ultrasonic Sound Detector

track down high frequencies

Published in issue 381, September 2008

Ultrasonic Sound Detector
Using the circuit described here you can quickly and simply check whether harmful sounds with a high frequency are being produced somewhere nearby, especially important at locations where the so-called ultrasonic teen-deterrents against loitering youths are installed. Ten LEDs indicate the sound pressure of signals with frequencies between 16 and 40 kHz.

Click below to download a PDF copy of this article from Elektor magazine.

 

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Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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