| LRAD Overview |
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YOU HAVEN'T HEARD IT UNTIL YOU'VE HEARD IT!
The Long Range Acoustic Device™ (LRAD®) is a breakthrough hailing and warning, directed acoustic device designed to communicate with authority and exceptionally high intelligibility.
DescriptionLRAD™ is a registered trademark of American Technology Corporation The Long Range Acoustic Device (LRAD™) is a highly directional hailing, warning and deterrent system that is designed to communicate with authority, influence behavior, or determine intent. Developed specifically in response to the USS Cole attack in October 2000, the LRAD fulfills the capability gap for vessels to hail, notify, and warn approaching vessels at significant ranges with clear voice or prerecorded messages in almost any language. Conventional high output acoustic devices have semi-spherical propagation patterns making users and anyone located behind the unit subject to excessive Sound Pressure Levels (SPL). With large inductive loads, they consume high levels of power due to low efficiencies. They are heavy, bulky, and make it almost impossible to place sound exactly where you need it. Their reflections and secondary sounds cause lack of clarity, high distortion, and low intelligibility.
To achieve its unique directivity acoustic output, the LRAD utilizes highly efficient, customized capacitive transducers and requires modest power requirements - less than 200 to 400 watts to achieve full output. The high directivity of the LRAD device reduces the risk of exposing nearby personnel or peripheral bystanders to excessive audio levels. Sound behind the LRAD unit is over 40 dB less than the on-axis forward output. The LRAD also incorporates multiple high efficient switch-mode power conversion systems. It's inherently compact and light nature makes operating the system easy. In all cases, where the LRAD™ has been used: NL, vessel identification/intent, force protection mode, or hailing an escort, it has always had a positive reponse on its operation and capability. Hailing at ranges of up to 1200 meters (3937 feet aprox.) to an escort vessel is no problem. Whether used for search and rescue, patrol, or SWAT operations, this portable unit enhances measures without exposing nearby personel or peripheral bystanders to excessive audio levels. For very high SPL's, los power consumption, long range, narrow beam, high intelligibility, and superior operator safety; the LRAD is the premiere choice.
Intensity Levels
According to OSHA* , hearing loss is a result of time exposure and decibel level. When LRAD is used in accordance with the operating instructions, no one is exposed to harmful audio levels.
*OSHA stands for Occupational Safety and Health Administration, an American Federal Agency.
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