The Global Leader in Long Range Acoustic Hailing Devices


Mass Notification & Emergency Warning

LRAD is Revolutionizing Mass Notification with
Highly Intelligible Voice Broadcasts

Until recently, voice communication had been an afterthought for mass notification systems. Most warning systems sound sirens to alert of approaching danger, but are incapable of clear voice broadcasts containing critical information about the severity of the situation and recommended actions to protect and save lives. Maintaining order and safely conducting emergency preparations can create significant challenges for civil authorities and law enforcement during crisis situations.

The LRAD Difference

LRAD replaces the limited voice quality and range of obsolete, siren-based mass notification systems and reinforces reverse 911 calls, email, text messages, and other notification measures to ensure affected populations simultaneously hear and understand emergency announcements and instructions.

LRAD ONE VOICE® systems combine attention-commanding warning sirens with exceptionally intelligible voice messages, enabling authorities to communicate over wind, traffic, engine and background noise from close range up to 5.3 sq. kilometers from a single installation. LRAD systems are self-contained or easily integrated with existing communications infrastructure.

Directionality & Range

LRAD broadcasts are safely optimized to the primary human hearing range of 1 – 5 kHz and can be focused in a 15° – 60° pattern or transmitted omnidirectionally 360° for uniform message coverage. LRAD systems range from mobile units to permanent installations for every type of emergency communication situation.

360X_area_range_college-01In crisis situations, fear-fueled actions can lead to chaos. Broadcasting clear messages, instructions and information can lead to safer, more orderly reactions, ease panic and save lives.


By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has eliminated the shortcomings of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies. Clearly heard and understood over crowd and traffic noise, LRAD ONE VOICE™ systems provide a superior communications capability for general announcements and emergency situations.

LRAD goes anywhere communication is needed. From portable devices to larger systems temporarily or permanently mounted on poles, buildings, trailers, vehicles or helicopters, LRAD systems are highly effective in communicating lifesaving information locally and over large areas before, during, and in the aftermath of emergency situations.

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