Acoustic hailing device · Real-world technology
LRAD family introduced in 2003
Overview
A directional acoustic hailing device used to transmit intelligible voice commands and alert tones over distance and through heavy background noise.
How it works
High-output acoustic drivers, waveguide-controlled directivity, optimized speech frequencies, amplification, and rugged portable or vehicle-mounted control systems.
Appearances
Books: Book 3 — Paso del Norte; Watchtowers
Chapters: Book 3 — CHAPTER NINETEEN; Watchtowers — CHAPTER SIX
Series and continuity notes
Family-level entry because the prose says LRAD without a model number.