RSSSuneth Attygalle made a pair of sight-blocking goggles that help you echolocate with the use of an ultrasonic rangefinder sensor. He used an Atmega8 chip running an Arduino bootloader, and some welding goggles. He even made a bat goggle instructable so you can make them yourself including source code and wiring diagram.
HOW TO - Ultrasonic bat goggles
Posted by Becky Stern |
May 27, 2008 07:00 PM
Arduino, DIY Projects, Electronics, Instructables |
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It would be enhanced if you had microcomputers around. You could send out chirps and use cross correlation to determine the impulse response of the channel. Those ultrasonic transmitters only have a bandwidth of about 1 kHz. It should be possible to use an ATMega8 processor for the cross correlation. With smart hardware this might even be done with very little hardware.
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People that can't see well enough to move around would benefit from this.
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