Technical illustration of an LRAD unit on a tripod, with callouts labeling the flat panel acoustic emitter, hexagonal speaker grid, and mounting yoke. The image focuses on the physical design that enables highly directional, high-intensity sound projection.
Semi-circular technical diagram showing the directional sound output of an LRAD. A narrow red zone marks the direct beam where hearing damage risk is highest, flanked by yellow off-axis risk zones and wider green areas labeled as relatively safer. Distance markers and angle measurements illustrate how sound intensity drops with distance and lateral movement.
Screenshot of the NIOSH Sound Level Meter App information page. The page explains that the app measures workplace noise exposure and combines features of professional sound level meters and noise dosimeters. At right, two smartphones display live decibel readings in the mid-70 dB range, demonstrating real-time sound level monitoring.
Illustrated checklist of recommended personal protective equipment for loud environments: foam earplugs, passive over-ear earmuffs, safety glasses, and a glossy poster board used as a stiff sound reflector. A warning label highlights “do not use electronic noise-canceling headphones,” reinforcing guidance specific to LRAD exposure.
What Is an LRAD, and Why People Are Asking Us About It … 🔊 👂
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