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by vineyardmike
1516 days ago
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And what if we could mount these directional speakers directly on someone’s head! Then we could reduce the volume a lot so it’s even quieter to neighbors. Maybe use some sort of physical bell or cup shape to direct it right into someone’s ears without ultrasonics (for cost reasons). Then we might save enough that we can use 2x speakers to get L/R audio streams. |
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Ultrasonic speakers aren’t even exotic tech. I first encountered one in a museum at least ten or fifteen years ago.