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Soundlazer "Snap" - The Directional Parametric Speaker by Richard Haberkern — Kickstarter
2022 original ultrasonic directional speaker with 40kHz frequency Parametric Speaker System for museum home theater - AliExpress
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Ultrasonic Directional Speaker - Guangzhou DSPPA Audio Co., Ltd.
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Directional Speakers
Parametric Speaker (Single directional) Test Kit (Not Assembled) 9.9mmx50pcs | eBay
Directional Speakers - Ultrasonic Audio Technologies
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Super Directional Loudspeaker, PROPA-U100 Outdoor – Eltem Corp.
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DIY Ultrasonic Audio Laser (Directional Speaker) - YouTube
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Directional Speakers - Ultrasonic Audio Technologies
