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The Acme siren is a musical instrument used in concert bands for comic effect. Often used in cartoons, it produces the stylized sound of a police siren. It is one of the few aerophones in the percussion section of an orchestra. The instrument is typically made of metal and is cylindrical.
In a pneumatic siren, the stator is the part which cuts off and reopens air as rotating blades of a chopper move past the port holes of the stator, generating sound. The pitch of the siren's sound is a function of the speed of the rotor and the number of holes in the stator. A siren with only one row of ports is called a single tone siren.
The use of flashing lights and sirens is colloquially known as blues and twos, which refers to the blue lights and the two-tone siren once commonplace (although most sirens now use a range of tones). In the UK, only blue lights are used to denote emergency vehicles (although other colours may be used as sidelights, stop indicators, etc.).
CBS News said in their caption that the sound was so accurate that some officers thought that their vehicles' sirens might have been faulty. Inspector Simon Hills described the mimicry as “so ...
A typical siren found on police stations in Taiwan, seen with loudspeakers around it. Either the yellow mechanical siren or the surrounding electronic sirens are in service. Taiwanese civil defense sirens are erected on police stations and commanded by the nation's Civil Defense Office (民防指揮管制所). The government issues air raid ...
This Q2B or "Q-siren" is mounted on a Pierce Platform Aerial Fire Truck owned by the City of Bellingham, WA. The Q2B siren ("Q-siren") [1] is an electromechanical siren that is produced by the Federal Signal Corporation and is most recognizable for its sound, which is trademarked, and the look of the siren.
New York Gov. Kathy Hochul called for the immediate dismissal of 14 prison employees after the death of Robert Brooks earlier this month.
Over the next two-and-a-half quarters, though, a strange stalemate ensued. Arizona State held onto the ball for nearly three times as long as Texas, 32:49 to 12:11 through three quarters.