These stickers, thinner than temporary tattoos, have a grid of silver wires in them that make sound when electrified. They also work as microphones.
After receiving an electric audio signal from a music player, the tiny loudspeaker heats up the wire grid to about 33°C, which replicates the sound pattern by changing the pressure of the surrounding air. Our ears pick up these changes in air pressure as sound waves.
The microphone operates in reverse, converting speech sound waves back into an electric signal, which can then be stored and played back by a smartphone or computer. It can detect sound waves coming from the mouth, but it can also recognize words simply from the rumbling of the vocal cords through the skin, the team reports today in Science Advances.
In this U.S. Navy video, the USS Portland (LPD 27) conducts a Laser Weapon System Demonstrator Test in the Pacific Ocean off Pearl Harbor, Hawaii.
Your concerns about the privacy and security risks of using state-run coronavirus contact tracing apps? They’re reasonable concerns.
The Wall Street Journal reported on Friday that federal and state regulators in the U.S. are preparing to file antitrust lawsuits against Google, saying the company abused its dominance of online search and advertising to crush competition and maximize profit.
Last year, over 43 million Americans hit the road to celebrate Memorial Day, the unofficial start of summer. That was the second-highest travel volume this century, according to AAA, but with COVID-19 fears and quarantine orders only now starting to ease, it’s safe to say this year probably won’t attract numbers anywhere close to that […]
It doesn’t do you much good to come up with a brilliant concept that you can’t translate into a working real-world prototype. Whether you’re thinking about building a home, a mechanical tool or a toy, that’s where the magic of computer-aided design and drafting software like AutoCAD comes into play. The longtime leader in the […]
Memorial Day has always been the traditional start to the summer season — and there’s never been a summer with more people more ready to get out and enjoy life outside their home than this one. Of course, food will be a big part (if not the centerpiece) of all of our summer celebrations, so […]