Best Directional Speakers/Super Directional Speaker for Museums
LA1525SD Ultra Directional Speaker System 25W | AjmanShop
Premium Bluetooth Directional Ultrasonic Speaker for Speech and Home - China Ultrasonic Speaker, Directional Speaker | Made-in-China.com
Bluetooth Mini Portable Directional Speaker for sale, Directional Speaker Company - Audfly
Bosch LS1-OC100E1 Hemi-directional loudspeaker - Soundgear Australia
ELTEM / PROPA-U100 / Directional Loudspeaker, Super Directional Speaker, Ultrasonic Speaker, Directional Sound System for Museums, Exhibits, Art Gallery and Digital Signage – Black : Amazon.ca: Electronics