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The Modulator has a similar setup to the Whelen WPS 2700, 2800, 2900, and OmniAlert omnidirectional speaker arrays. The Whelen arrays have single driver cells, [3] while Modulators have multi-driver cells. The American Signal I-Force siren, which uses stacked, elliptical speaker cells that provide omnidirectional sound output, is also similar ...
Rumbler siren. A Rumbler siren is a type of emergency vehicle siren used primarily in the United States.Developed in 2007 by Federal Signal Corporation, and sounding at a low-frequency level, it is designed to be heard by motorists who may otherwise be unable to hear high-frequency sirens due to ambient noise, such as urban traffic.
In 2017, the EU authorised the use of nettles (Urtica spp.) as a starting material for the production of commercial plant protection products. [2] In France, the introduction of new agricultural framework legislation in 2006 triggered a major controversy, the so-called "nettle manure war". [3]
The Whelen Company is divided into four divisions and has a subsidiary called Whelen Motorsports.. The four divisions of the company are as follows: The Automotive Division — provides lightbars, dashlights, strobe kits, siren boxes, and other public warning systems to be mounted on or within vehicles, [3] rotating sirens, and student alert systems with voice broadcast capability.
The series began as the NASCAR Winston Racing Series in 1982 as weekly, local track racing sanctioned by NASCAR. Due to restrictions imposed by the Tobacco Master Settlement Agreement, Winston's sponsorship was replaced by Dodge in 2001 (coinciding with their re-entry to the Cup Series that year), lasting until 2006.
Brown spider monkey (Ateles hybridus) Platyrrhini is a parvorder of primates. Members of this parvorder are called platyrrhines, or New World monkeys, and include marmosets, tamarins, and capuchin, squirrel, night, titi, saki, howler, spider, and woolly monkeys. Platyrrhini is one of three clades that form the suborder Haplorrhini, itself one of two suborders in the order Primates. They are ...
Some central office switches in the United States, notably older GTD-5 EAX systems, utilize a single frequency tone, 480 Hz, known as High Tone for this purpose. In either case, the tone is substantially louder than any other signal transmitted over a copper POTS circuit; loud enough to be heard across a room from an unused off-hook telephone.
Another example is FC-75, perfluoro(2-butyl-tetrahydrofurane). There are 3M fluids that can handle up to 215 °C (419 °F), such as FC-70 (perfluorotripentylamine). [2] Fluorinert is used in situations where air cannot carry away enough heat, or where airflow is so restricted that some sort of forced pumping is required.