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These directional speakers throw sound in focused beams like a spotlight - Yanko Design
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Buy Directional Speaker Model B - Focusonics®
Directional Speakers - Ultrasonic Audio Technologies
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What are directional speakers? How directional sounds can be useful?
HSS Directional Speaker - InterpretationShop
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DIY Ultrasonic Audio Laser (Directional Speaker) - YouTube
Ultrasonic Directional Speaker with Focused Audio Technology Parametric Array Speaker for museum
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Omni-directional single-person speaker on Kickstarter
Akoustic Arts Directional Speakers | For Retail, Museums, Events and More
