Directional audio speakers made from glass introduced - Inavate
DIY Omni Directional Speaker Build | Turntables, Record Players & Vinyl
DIY Ultrasonic Audio Laser (Directional Speaker) - YouTube
Ultrasonic Directional Speaker v1 | Hackaday.io
How to Make Ultrasonic Directive Speaker Circuit - Homemade Circuit Projects
Idea for a classic omnidrectional speaker build - Techtalk Speaker Building, Audio, Video Discussion Forum
DIY" speaker building is an... - Sparrow Legs Speaker Design | Facebook
Build a Parabolic Speaker : 9 Steps - Instructables
Ultrasonic Sound Gun (Parametric Speaker) : 3 Steps (with Pictures) - Instructables
DIY: Omni Directional Speakers | diyAudio
Building the dream Omni-Directional LoudSpeaker - Page 2 - MiniDSP - Results from #15
Red Spade Audio: DIY Omni loudspeakers
Building the dream Omni-Directional LoudSpeaker - MiniDSP
Sound in every direction - YouTube
Homebrew parametric speaker - Make:
Directional Speaker | Hackaday
Ultrasonic Sound Gun (Parametric Speaker) : 3 Steps (with Pictures) - Instructables
Homemade Omnidirectional Speakers In A Unique Enclosure | Hackaday
Soundlazer "Snap" - The Directional Parametric Speaker by Richard Haberkern — Kickstarter
Building the dream Omni-Directional LoudSpeaker - MiniDSP
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The Ultimate Guide to Directional Speakers
New Information and Communication Technology 'SteganoSonic': Uses Supersonic Waves to Send Soundless Digital Information | SoraNews24 -Japan News-
Directional loudspeakers - How they work - Explain that Stuff
Umbrellas as Parabolic Speakers – Zach Poff
