Scientists Create ‘Pockets’ of Music from Inaudible Ultrasound Waves

The ultrasonic beam worsens the “audible enclaves” where they cross

By And Vergano Edited Sarah Lewin Frasier

Are you tired with ears? Are the reasons Headphones too heavy? Otherwise, the noise listening can be to help the “pockets” of noise.

Acoustic progressreported on March 17 US National Academy of Science Academy, It is usually based on crossovers crossing the ultrasonic beams or “to create hearing enclaves.” Uraro It travels with frequencies in the highest edge of human hearing, about 20 kiloherts, and is often used in medicine. The ultrasonic beams of the study were enough to be undeniable and can be made to bend, so ride around obstacles to create sound pockets.

In an era of podcasts and luxury sound systems, without having to isolate the audience from the rest of the world, it seems like a promising technology, the study of the study of Yun Jing, Pennsylvania State University. The new progress, he says, improves “Parametric” ultrasonic technology This creates high auditory beams.

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“We are not based on new concepts. But the beauty of this work is that we can combine technologies in very interesting ways,” Jing says. “And there are some interesting applications,” he added to media-oriented communications from home theaters.

To produce audio enclaves, the Jing’s team focused on two six-inches of six-year spaces. Each were covered with 3D print metamaterials, and their small slots interfeducers the beams of the authorities when they crossed each other. Then the researchers parked the human head mannequin in front of these non-sound speakers.

Basically, audio enclaves are an acoustic subtraction feat. When a ultrasonic ray that bends the right, and the other was bent on the left, with the frequency they heard by humans in the fixed space. In demonstration, researchers hit the “Hallelujah Chorus” in George Frideric Handel Mesysia-It is impossible to the sovereign.

The beams worked with airport pressure ¹Ventor /_5,200 For the exposure of the food and drug administration security for the exposure to the ultrasound, the paper stated. However, Mark hinders, in William & Mary, in William & Mary, because of the study of studies, the ultrasound can damage the audience, the techniques would require large security tests.

For now, the sound quality of the prototype is not perfect. Jing says that his team intends to use the machines learning algorithms to analyze the sounds created by the device and improve its performance. In view of the small size of the Emitters, it suggests, audio enclaves can be the first request for cars.