Acoustic Barcodes Are Scannable With Fingernails & Pens [Video]
Etched patterns in plastic make music that also sends price data to your phone.
A team from Carnegie Mellon University has come up with the concept design of acoustic barcodes where the bars are etched into a physical material such as wood, glass, stone, and plastic. A unique sound is produced by running a phone, fingernail, pen, or any hard-edged object across the barcode. A software app can process these waveforms to create and recognize the binary ID.