Directional loudspeakers | lb lautsprecher und beschallungstechnik gmbh
Focusonics® - Directional speakers delivering a beam of sound
Akoustic Arts Directional Speakers | For Retail, Museums, Events and More
Directional speaker delivers personal sound, sans-headphones
Bluetooth Mini Portable Directional Speaker for sale, Directional Speaker Company | Audfly
HyperSound HSS 3000 Directional Sound Speakers – Videotel Digital
What are directional speakers? How directional sounds can be useful?
Alphajammer - What is a parametric speaker? 🔊 Experiments with parametric and directional speaker systems have been going on since the early 1960s. Ultrasonic sound has much smaller wavelengths than regular audible
Directional loudspeakers - How they work - Explain that Stuff