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  2. Siren (alarm) - Wikipedia

    en.wikipedia.org/wiki/Siren_(alarm)

    It is not unusual, especially in the case of modern fire engines, to see an emergency vehicle equipped with both types of sirens. Often, police sirens also use the interval of a tritone to help draw attention. The first electronic siren that mimicked the sound of a mechanical siren was invented in 1965 by Motorola employees Ronald H. Chapman ...

  3. Rumbler siren - Wikipedia

    en.wikipedia.org/wiki/Rumbler_siren

    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.

  4. Wikipedia:Free sound resources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Free_sound_resources

    From field-recordings to sound fx, drum loops and musical instrument samples. CC0, CC BY, CC BY-NC Samplibrary: No Yes Custom HD 96khz 24 bit wav recorded sounds with ongoing free new sounds and The Suggestion Engine where creators can request sounds Royalty Free Videvo Sound Effects: Yes Yes Royalty Free Sound Effects with a large selection of ...

  5. Bird in England Mimicking a Police Siren Sounds Just Like the ...

    www.aol.com/bird-england-mimicking-police-siren...

    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 ...

  6. Q2B - Wikipedia

    en.wikipedia.org/wiki/Q2B

    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.

  7. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    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.).

  8. Acme siren - Wikipedia

    en.wikipedia.org/wiki/Acme_siren

    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.

  9. Federal Signal Modulator - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Modulator

    ATTENTION! TESTING OF THE EMERGENCY SIREN SYSTEM IS COMPLETE. PLEASE REGARD ANY FURTHER ALARMS.” The Pilgrim Power Plant never had any major emergencies, but if there was one, the sirens would sound in a tone, followed by a voice announcement. As of 2023, the sirens are still there, but it is unclear whether they are still active.

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