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Ultrasonic Sound Gun Precisely Aims Your Music

When listening to music you sometimes cannot avoid the situation where other people get annoyed because they feel it disrupts their important doings or they do not share your taste in avant-garde doom metal… hackaday.com/2020/04/30/ultras

Original tweet : twitter.com/hackaday/status/12

· · twoot · 0 · 1 · 0
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