Noise-canceling headphones? Try noise-canceling windows.
Engineers and scientists from NASA and MIT are building a plan to make it happen.A device that acts like noise-canceling headphones could help reduce the din from open windows, a new study finds.
To test the device, researchers placed it in a two-panel domestic sliding window 1 square meter in size and played sound clips of road, train and aircraft noises from a loudspeaker 2 meters away. Using 18 microphones inside the room, they found the device reduced the volume by roughly half for noises with a frequency above 500 hertz, a range that includes traffic and trains. This outperforms the acoustic insulation that a fully shut single-glazed window would provide, they noted.
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