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The Boomerang unit attaches on a mast to the rear of a vehicle and uses an array of seven small microphone sensors. The sensors detect and measure both the muzzle blast and the supersonic shock wave from a supersonic bullet traveling through the air (and so is less effective against subsonic ammunition).
Midland Radio develops, manufactures, and imports both consumer and business radio communications products. They were the first to introduce a 14-channel FRS radio to the market. Here is an overview of their product categories: Midland Radio's ER210 from the Emergency Preparedness Line. Midland Radio's MXT275 from the MicroMobile Line.
HyperSpike is a brand name for acoustic products manufactured by Ultra Electronics – Undersea Sensor Systems Inc. (USSI), in Columbia City, Indiana. HyperSpike is composed of a line of acoustic hailing devices that feature integrated electronics with a flat frequency response curve.
The technology used in "siren mode" (called an "alert tone" by Genasys [5]), primarily for usage in emergency situations, has also been used for crowd control. In this mode, it allows sound transmission at around 2,000–4,000 Hertz , which causes maximum discomfort for the people targeted, as this is the frequency range at human hearing is ...
The drinks menu at Sonic Drive-In, obviously. Y. Paris Hilton and Nicole Richie can add another endeavor to their subway-train-long multihyphenate titles: nonalcoholic drink mixologists. It’s ...
Electronic pest control is the name given to any of several types of electrically powered devices designed to repel or eliminate pests, usually rodents or insects. Since these devices are not regulated under the Federal Insecticide, Fungicide, and Rodenticide Act in the United States, the EPA does not require the same kind of efficacy testing that it does for chemical pesticides.
Alert colors vary by state with the exception of the Amber alerts. An Amber Alert is for a child under 18 who is missing or endangered. It was named after Amber Hagerman, 9, who was kidnapped and ...
The North Luzon Expressway's raised plastic transverse rumble strips approaching Balintawak Toll Barrier, Philippines. Rumble strips (also known as sleeper lines or alert strips) are a traffic calming feature to alert inattentive drivers of potential danger, by causing a tactile fuzzy vibration and audible rumbling transmitted through the wheels into the vehicle interior.
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