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The Whelen Engineering Company is an American corporation that designs and manufactures audio and visual warning equipment for automotive, aviation, and mass notification industries worldwide. Founded in a Deep River, Connecticut garage in 1952, [ 1 ] Whelen has become a provider of warning lights, white illumination lighting, sirens, and ...
A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.
It contained just a single 10-inch speaker, and was designed to be powered by an external amplifier, and contained an additional output for an extension speaker. Control of the speaker was via two switches, one of which controlled the speed and one switched the rotors on and off. It was also released later as the Fender Vibratone. [43] [44]
Legislative Reference Library of Texas (May 6, 2006). "Speakers of the Texas House of Representatives, 1846-present". Archived from the original on July 25, 2010; Sorensen, Stephanie S. (2006). "Speakers of the Texas House of Representatives"
KTXX-FM (104.9 MHz, "La Raza 95.1 y 104.9") is a commercial radio station licensed to Bee Cave, Texas, and serving the Greater Austin metropolitan area. The station broadcasts a Regional Mexican radio format simulcast from KZNX. Genuine Austin Radio owns, and Norsan Media operates the station, with a sale to the latter pending. [2]
Diagram of a typical locomotive air horn power chamber, showing operation. Train horns are operated by compressed air, typically 125–140 psi (8.6–9.7 bar), and fed from a locomotive main air reservoir. When the engineer opens the horn valve, air flows through a supply line into the power chamber at the horn's base (diagram, right).
The original settlement of Double Horn was established near the headwaters of Double Horn Creek in 1855, with the creek and town named for an incident where a pioneer found the remains of two bucks with interlocked antlers. It had a post office from 1857 to 1911, a school (the Double Horn School), a cotton gin, and two churches.
(right) Electric megaphones use a type of horn loudspeaker called a reflex or reentrant horn. The sound waves travel in a zigzag path through concentric widening ducts (b, c, and d) . An electric megaphone is a handheld public address system , an electronic device that amplifies the human voice like an acoustic megaphone, using electric power.