Applications

Mass Notification

Mass Notification & Emergency Warning

LRAD is Revolutionizing Mass Notification with Highly Intelligible Voice Systems

Until LRAD recently entered the emergency warning mass notification market, highly intelligible voice communication was not available. Standard mass notification installations sound sirens to warn, but nearly all are incapable of broadcasting highly intelligible voice messages containing critical information about the severity, location and expected duration of an emergency, and potentially lifesaving directions. Automated phone calls, emails, text messages, social media and other emergency notification measures are only effective if directories are continually updated.

LRAD ONE VOICE®

Revolutionary LRAD ONE VOICE systems are advanced mass notification solutions that broadcast warning sirens and exceptionally intelligible voice messages to protect and save lives. LRAD ONE VOICE systems ensure emergency warnings and general announcements are clearly heard and understood throughout coverage areas. LRAD life safety systems warn and communicate critical information to populations not receiving automated phone calls and other emergency notification measures by broadcasting attention-commanding warning sirens and extraordinarily clear voice messages over wind, traffic and background noise up to 12 sq. kilometers from a single installation.

Advanced Technology

Optimized to the primary human hearing range of 1 – 5 kHz, LRAD features advanced driver and waveguide technology to focus broadcasts in a 60° pattern or transmit 360° with uniform area coverage.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies. LRAD ONE VOICE systems are the only mass notification solutions that offer several volume control settings to customize broadcast area coverage.

Remotely monitored and activated by TCP/IP, fiber, satellite, Wi-Fi, digital or analog radio, Ethernet or hard wire, LRAD ONE VOICE systems are the most flexible and easily configured mass notification solutions available.

Superior Voice Intelligibility

Based on Federal Emergency Management Agency (FEMA) and U.S. Military United Facilities Criteria (UFC) guidelines, the minimum standard for high-powered speaker array (HPSA) mass notification systems is a 0.5 speech transmission index (STI) measurement.
LRAD ONE VOICE systems feature the highest STI rating in the mass notification industry at 0.95, substantially exceeding all FEMA and UFC voice intelligibility requirements.
LRAD systems are self-contained or easily integrated with existing communications infrastructure. 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 disasters and emergency situations.

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Mass Notification & Emergency Warning

Proven Performance

Tsunami Warning

Yokohama, Japan

After the devastating March 2011 earthquake and tsunami, Japan instituted a nationwide campaign to replace its technologically outdated, underperforming giant voice speakers with the superior performance and voice intelligibility of LRAD 360X ONE VOICE® life safety systems.

Yokohama, Japan upgraded it’s widespread tsunami warning mass notification system with new LRAD 360X systems.

LRAD 360X integration into existing mass notification networks and new installations are planned in Japan and other Asian countries.

Military Bases

Military Base PA & Emergency Warning System

In the wake of the deadly Ft. Hood, Texas shootings, the U.S. Army base at Ft Leavenworth, Kansas upgraded its security by integrating the LRAD 360X into its existing mass notification system. In non-emergency situations, military bases also require mass communication for playing bugle calls, the national anthem and broadcasting general announcements.

In the wake of the deadly Ft. Hood, Texas shootings, the U.S. Army base at Ft Leavenworth, Kansas upgraded its security by integrating the LRAD 360X into its existing mass notification system. In non-emergency situations, military bases also require mass communication for playing bugle calls, the national anthem and broadcasting general announcements.

Natural Disasters

Colorado National Guard, 2013 CO Floods
The Colorado National Guard deployed several LRAD systems in their successful ground and airborne search and rescue operation of over 3,400 civilians during the worst flooding in the state’s history in 2013.“…LRAD has performed superbly and has served to enhance our security as well as our search and rescue missions.” BG Dana M. Cappozella
Colorado National Guard; Thank you letter to LRAD Corporation

Thailand, Flood Relief
Thailand’s Department of Disaster Response ordered LRAD systems to support their 2011 and 2012 flood relief efforts.

Japan, 2011 Earthquake & Tsunami
Japanese disaster relief authorities used LRAD 100X and LRAD 500X systems for mass communication after a devastating earthquake and tsunami in 2011.

New Orleans, LA, Hurricane Katrina
LRAD systems were deployed in the aftermath of Hurricane Katrina to communicate to survivors stranded on tops of cars and houses by floodwaters and for mass notification around the Superdome.

Haiti, 2010 Earthquake
The U.S. Military employed several LRAD systems in Haiti to assist with emergency communications in the aftermath of the deadly 2010 earthquake.

Portable LRAD 100X systems were used to broadcast critical information in multiple languages to survivors gathered around aid stations. LRAD 500X systems were mounted on helicopters and utilized to broadcast the locations of aid stations and supplies across impassable areas.

Lifeguard Towers

La Jolla, CA

La Jolla, California lifeguards utilize LRAD DS-60 Horn systems mounted on lifeguard towers overlooking beaches near the Children’s Pool and La Jolla Cove to broadcast highly intelligible warnings, notifications and instructions. The unprecedented voice clarity and range of LRAD 60° Horn systems ensure lifeguards are clearly heard and understood over surf, wind and background noise.

Recreation Areas

South Korea

LRAD ONE VOICE systems provide a superior way to communicate live or recorded messages to certain locations or throughout beaches and recreation areas for:

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Mass Notification & Emergency Warning

Recreation Areas & Theme Parks

Enhancing and securing public safety at recreational areas during emergency situations is a critical priority in today’s increased threat environment. Severe weather, active shooter and bomb threats, AMBER alerts and other emergency situations pose significant challenges for authorities tasked with keeping recreation and outdoor enthusiasts safe.

Bullhorns, portable/vehicle speakers and P.A. systems have limited range and poor vocal clarity. LRAD ONE VOICE® systems combine public address with mass notification and feature exceptional vocal intelligibility, broadcasting warning sirens and crystal clear voice messages in uniform 360° coverage from close range up to 12 sq. kilometers.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

ONE VOICE systems provide safety officers a superior way to communicate live or recorded messages to certain locations or throughout parks and recreation areas in any language for:

LRAD ONE VOICE systems provide a superior communications capability and ensure multilingual warnings and lifesaving instructions are simultaneously heard and clearly understood over wind, engine and background noise. LRAD mass notification systems are configurable and can be remotely monitored and activated by Ethernet, Wi-Fi, digital or analog radio, fiber or hard wire.

LRAD systems effectively inform and direct large crowds, provide information and updates on emergency situations, combine public address with mass notification and saves lives.

The LRAD Advantage:

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Mass Notification & Emergency Warning

Military Mass Notification & P.A.

During emergency situations on military bases, personnel safety is the highest priority. When approaching severe weather, fire, bomb and active shooter threats, chemical releases, and other life threatening incidents occur, all personnel on site must be alerted and base emergency protocols quickly initiated.

In non-emergency situations, military bases also require mass communication for playing bugle calls, the national anthem and broadcasting general announcements.

Unlike siren-based giant voice systems that have limited voice capability and range, LRAD ONE VOICE® systems combine public address with mass notification and feature exceptional intelligibility, broadcasting warning sirens and crystal clear voice messages in uniform 360° coverage from close range up to 12 sq. kilometers.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD mass notification systems are configurable and can be remotely monitored and activated by Ethernet, Wi-Fi, digital or analog radio, fiber or hard wire and provide a superior communications capability for general announcements and emergency situations.

The LRAD Advantage:

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Mass Notification & Emergency Warning

Industrial Facilities

Personnel safety is the highest priority during emergency situations. When fire, chemical releases, active shooter threats and other life threatening incidents occur, all personnel on site must be alerted and quickly evacuated from hazardous areas.

Standard industrial public address systems are limited in loudness, range and vocal clarity. LRAD ONE VOICE® systems combine public address with mass notification and feature exceptional voice intelligibility, broadcasting warning sirens and voice messages in uniform 360° coverage from close range up to 12 sq. kilometers.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD systems ensure multilingual warnings and lifesaving instructions are simultaneously heard and clearly understood over wind, machinery and background noise providing a superior communications capability for general announcements and crisis situations.

LRAD mass notification systems are configurable for all types of industrial facilities and can be remotely monitored and activated by TCP/IP, fiber, satellite, Wi-Fi, digital or analog radio, Ethernet or hard wire.

The LRAD Advantage:

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Mass Notification & Emergency Warning

Reliable Emergency Communication

When major disasters strike, existing infrastructure is disrupted and compromised, power and communication systems fail, rural areas can be isolated and urban streets can become impassible and dangerous. Reliable communication for maintaining civil order, conducting search and rescue operations, and providing relief distribution is a must-have capability for emergency responders.

LRAD goes anywhere communication is needed.

Unlike the limited voice quality and range of portable P.A. systems and bullhorns, LRAD ONE VOICE® systems broadcast with exceptional intelligibility from close range up to 12 sq. kilometers enabling emergency responders to communicate over wind, engine and background noise. Portable LRAD systems are self-contained and do not rely on external power or communication infrastructure.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

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

Using ground based and helicopter mounted LRAD systems, law enforcement, government and civil authorities mobilize emergency communications by broadcasting critical information and warnings in multiple languages.

The LRAD Advantage:

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Mass Notification & Emergency Warning

First Responders

When disasters strike, existing infrastructure is disrupted and compromised, power and communication systems may fail, rural areas can become isolated and urban streets impassible and dangerous. Reliable communication for maintaining civil order, conducting search and rescue operations, and providing relief distribution is a must-have capability for emergency responders.

LRAD systems are highly effective in communicating warnings, instructions and commands locally or over wide areas before, during, and in the aftermath of emergency situations.

Instantly Deployable

From hand portable devices to larger systems that are mounted temporarily or permanently on vehicles, trailers or helicopters, LRAD ONE VOICE® systems go anywhere communication is needed.

LRAD’s highly intelligible, multilingual voice messages and alert tones are clearly heard and understood over wind, engine, rotor wash and background noise in any type of terrain or environment over distances ranging from close range up to 12 sq. kilometers.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD systems enable first responders to communicate to affected individuals and populations by making them aware help has arrived and providing assurance, encouragement and lifesaving instructions.

LRAD’s unmatched acoustic performance comes in a rugged package that operates in the harshest conditions. Interfaces include an all-weather microphone and a hardened MP3 player designed for easy operation.

The LRAD Advantage:

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Mass Notification & Emergency Warning

Campus P.A. & Emergency Notification

Severe weather, active shooter incidents, bomb threats, hazardous material events and other crisis situations highlight the need for improved campus communication systems that combine public address and emergency notification.

LRAD systems are highly effective in communicating warnings, instructions and commands locally or over wide areas before, during, and in the aftermath of emergency situations.

Older campus emergency warning systems degrade over time and have critical gaps in coverage, particularly the absence of highly intelligible voice messages containing lifesaving information and instructions during emergency situations.

The LRAD Difference

LRAD ONE VOICE® systems warn and communicate critical information to students,staff and faculty not receiving automated phone calls, emails, text messages, social media and other emergency notification measures by broadcasting warning sirens and exceptionally clear voice messages up to 5.3 sq. kilometers from a single installation.

The LRAD Difference

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 hand portable units to permanent installations for every type of campus public address and emergency communication situation.

In crisis situations, fear-fueled actions can lead to chaos. Broadcasting clear voice 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 overcome the limitations 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 crisis situations.

In emergency situations, LRAD ONE VOICE systems:


When local infrastructure fails, LRAD serves as a life safety system to broadcast notifications and instructions. Mobile LRAD systems are self-contained and do not rely on external power or communication infrastructure.

LRAD acoustic solutions are widely recognized for their reliability, affordability, effectiveness and safety.

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Mass Notification & Emergency Warning

Severe Weather & Tsunamis

Standard severe weather and tsunami warning systems sound sirens to alert of approaching danger, but are incapable of broadcasting clear and highly intelligible voice messages 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 during extreme events.

Combining warning sirens with highly intelligible voice messages eases the panic associated with traumatic events. Notifications and instructions broadcast with exceptional vocal clarity, inform, calm and provide potentially lifesaving information.

LRAD ONE VOICE® LRAD life safety systems warn and communicate critical information to populations not receiving automated phone calls, emails, text messages, and other emergency notification measures by broadcasting attention-commanding warning sirens and extraordinarily clear voice messages over wind, traffic and background noise up to 12 sq. kilometers from a single installation.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD ONE VOICE® systems replace siren systems and augment automated phone calls, voice, email and text messages, social media and other notification measures to ensure endangered populations hear and understand emergency warnings and instructions.

By communicating safe evacuation routes and protocols, identifying hazardous egress routes and other dangers, and providing wide area updates on changes to emergency warnings and instructions, LRAD broadcasts safely communicate to affected populations before, during, and in the aftermath of severe weather and tsunamis, facilitate safety, and save lives.

LRAD goes anywhere communication is needed

From hand portable devices to larger systems that are mounted temporarily or permanently on vehicles, trailers or helicopters, LRAD ONE VOICE® systems go anywhere communication is needed.

LRAD’s highly intelligible, multilingual voice messages and alert tones are clearly heard and understood over wind, engine, rotor wash and background noise in any type of terrain or environment over distances ranging from close range up to 12 sq. kilometers.

The LRAD Advantage:

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Mass Notification & Emergency Warning

Municipal & County Emergency Warning

Standard emergency warning systems sound sirens to alert of approaching danger, but are incapable of clear voice broadcasts containing critical information about the severity, location and duration of the situation and potentially lifesaving directions.

LRAD goes anywhere communication is needed.

From hand portable devices to larger systems that are mounted temporarily or permanently on vehicles, trailers or helicopters, LRAD ONE VOICE® systems combine warning sirens with highly intelligible broadcasts to provide information and instructions during preparedness exercises and emergencies.

Unlike siren mass notification systems, LRAD ONE VOICE™ systems warn and communicate critical information to populations not receiving automated phone calls, emails, text messages, and other emergency notification measures by broadcasting warning sirens and clear and unambiguous voice messages over wind, traffic and background noise up to 12 sq. kilometers from a single installation.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD provides a superior capability to communicate live or recorded multilingual messages for:


LRAD minimizes the number of emergency personnel needed to conduct and supervise large volunteer efforts during disaster drills and in the aftermath of a catastrophe.

LRAD broadcasts facilitate safety and save lives during crisis situations including:

The LRAD Advantage:

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Mass Notification & Emergency Warning

Humanitarian Response & Relief

When major disasters strike, existing infrastructure is disrupted and compromised, power and communication systems may fail, rural areas can become isolated and urban streets impassible and dangerous. Reliable communication for maintaining civil order, conducting search and rescue operations, and providing relief distribution is a must-have capability for first responders.

LRAD goes anywhere communication is needed.

From hand portable devices to larger systems that are mounted temporarily or permanently on vehicles, trailers or helicopters, LRAD ONE VOICE™ systems are highly effective in communicating warnings, instructions and commands over wide areas before, during, and in the aftermath of disasters and emergency situations.

Unlike the poor voice quality and limited range of bullhorns and siren-based notification systems, LRAD broadcasts with exceptional intelligibility and vocal clarity from close range up to 12 sq. kilometers enabling emergency responders to communicate over wind, engine and background noise. Portable LRAD systems are self-contained and do not rely on external power or communication infrastructure.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD systems enable civil authorities to communicate to affected populations, informing survivors that help has arrived and providing assurance, encouragement and lifesaving instructions.

The LRAD Advantage:

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Mass Notification & Emergency Warning

Humanitarian Response & Relief

When major disasters strike, existing infrastructure is disrupted and compromised, power and communication systems may fail, rural areas can become isolated and urban streets impassible and dangerous. Reliable communication for maintaining civil order, conducting search and rescue operations, and providing relief distribution is a must-have capability for first responders.

LRAD goes anywhere communication is needed.

From hand portable devices to larger systems that are mounted temporarily or permanently on vehicles, trailers or helicopters, LRAD ONE VOICE™ systems are highly effective in communicating warnings, instructions and commands over wide areas before, during, and in the aftermath of disasters and emergency situations.

Unlike the poor voice quality and limited range of bullhorns and siren-based notification systems, LRAD broadcasts with exceptional intelligibility and vocal clarity from close range up to 12 sq. kilometers enabling emergency responders to communicate over wind, engine and background noise. Portable LRAD systems are self-contained and do not rely on external power or communication infrastructure.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD systems enable civil authorities to communicate to affected populations, informing survivors that help has arrived and providing assurance, encouragement and lifesaving instructions.

The LRAD Advantage:

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Mass Notification & Emergency Warning

Outdoor Events – Public Address & Emergency Notification

Enhancing and securing public safety during large events and emergency situations is a critical priority in today’s increased threat environment. Severe weather, active shooter and bomb threats, AMBER alerts, and other emergency situations pose significant challenges for authorities tasked with keeping large outdoor events secure and peaceful.

Bullhorns and portable/vehicle loudspeaker systems have limited broadcast range and poor vocal clarity. LRAD ONE VOICE® mass notification systems broadcast highly intelligible voice messages and provide a superior capability to communicate live or recorded messages to large crowds in any language for:


With its commanding alert tone to safely ensure attention to the exceptionally clear notifications and instructions that follow, LRAD systems provide public safety personnel LRAD ONE VOICE® systems to communicate to crowds at large events. LRAD also serves as a force multiplier when a limited number of officers are available for security at outdoor events such as concerts, festivals, parades, fairs, demonstrations and sporting events.

By maintaining a smooth frequency response with an intensity variation of less than 5dB, LRAD has overcome the limitations of competitor systems by preventing audio fading and producing clear, unambiguous communication across all broadcast frequencies.

LRAD systems effectively inform and direct large crowds, provide information and updates on emergency situations, combine public address with mass notification and saves lives.

From hand portable devices to larger systems mounted on trailers, vehicles or helicopters, LRAD goes anywhere communication is needed.

The LRAD Advantage:

Grants & Funding


LRAD Corporation assists with the preparation of grant requests for federal, state, or local agencies.

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