Audio only where you want it with the Klang Ultrasonic Speakers concept
The ultrasonic transmitters would allow the user to control exactly where the sound emerges from the billions of points along the path of the signal
Article Summary
Rather than sound being pumped out from a loudspeaker in all directions, the Klang speaker concept proposes using a low level ultrasound to direct the audio only where it's required, leaving silence everywhere else. Such a system might allow audio output from a television to be sent to a different place in a room to sound from a hi-fi, allowing each listener to enjoy the experience without inconveniencing the other.
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