Washington University Researchers have discovered that voice assistant programs like Siri can be hacked with ultrasonic sound waves that go undetected by human ears - but you probably won't have ...

While laser tweezers can steer much smaller microscopic objects, sound waves can hoist micrometer- to centimeter-sized cargo (SN: 10/27/18, p. 16).The new device’s 40-kilohertz sound waves can ...

Sound is a very strange thing. An echo-prone room can be fixed with a single bit of foam in a corner. Noise can be 'cancelled' by playing a reversed sound wave back at your ears. And now a new ...

New technologies for mobile devices may use ultrasonic sound waves, and these devices have varying effects on different subsets of the population. Regulation of these technologies is in many ways ...