SoniControl (image)

Caption
This is an ultrasound-firewall for mobile phones.
Credit
St. Poelten UAS / Matthias Zeppelzauer
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Usage only with appropriate caption or credit.
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St. Poelten University of Applied Sciences
This is an ultrasound-firewall for mobile phones.
St. Poelten UAS / Matthias Zeppelzauer
Usage only with appropriate caption or credit.
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