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DIY parametric speaker
Ultrasonic Sound Gun (Parametric Speaker) - YouTube
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Ultrasonic Sound Gun (Parametric Speaker) : 3 Steps (with Pictures) - Instructables
Ultrasonic Directional Speaker With Focused Audio Technology Parametric Array Speaker For Museum - Instrument Parts & Accessories - AliExpress
DIY Ultrasonic Audio Laser (Directional Speaker) - YouTube
Soundlazer "Snap" - The Directional Parametric Speaker by Richard Haberkern — Kickstarter
Compact Ultrasonic Directional Sound Speaker for Home and Museum - China Ultrasonic Speaker, Directional Speaker | Made-in-China.com
DIY ultrasonic directional speaker
