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  2. Chrysler Air-Raid Siren - Wikipedia

    en.wikipedia.org/wiki/Chrysler_Air-Raid_Siren

    The operator's job was to start the engine and bring it up to operating speed, then to pull and release the transmission handle to start the wailing signal generation. The Chrysler Air Raid Siren produced the loudest sound ever achieved by an air raid siren. [1]

  3. List of sirens built by Alerting Communicators of America

    en.wikipedia.org/wiki/List_of_sirens_built_by...

    10 and 15 HP models were nearly the same, aside from motor used. The P-50 was and still is the loudest dual tone siren in the world. The P-15 (Single-tone) and P-50 were still being produced by ASC until 2002 and 2007, under different names (P-15 being the RM-127 and the P-50 being the RM-135/T-135 AC). The PN-20 was the last siren made by ACA.

  4. Siren (alarm) - Wikipedia

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

    Two early fire siren manufacturers were William A. Box Iron Works, who made the "Denver" sirens as early as 1905, and the Inter-State Machine Company (later the Sterling Siren Fire Alarm Company) who made the ubiquitous Model "M" electric siren, which was the first dual tone siren.

  5. 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.

  6. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    The signal that the alarm has passed: a siren sound with a constant pitch (400 Hz) repeated twice in a row for 30 seconds, with a 30-second pause between the signals (Figure 3). The alarm past signal also applies to the cancellation of the air raid warning and the disaster alarm past signal.

  7. 7 Best Alarm Clocks for Heavy Sleepers, According to a Sleep ...

    www.aol.com/lifestyle/7-best-alarm-clocks-heavy...

    Shop the best loud alarm clocks for heavy sleepers on Amazon and more that are recommended by our editor, who tested several of them, and a sleep psychologist.

  8. Tourist Sues Graceland Hotel for $75K Claiming 'Loud Fire ...

    www.aol.com/news/tourist-sues-graceland-hotel-75...

    For premium support please call: 800-290-4726 more ways to reach us

  9. List of unexplained sounds - Wikipedia

    en.wikipedia.org/wiki/List_of_unexplained_sounds

    While the audio profile of Bloop does resemble that of a living creature, [4] the source was a mystery both because it was different from known sounds and because it was several times louder than the loudest recorded animal, the blue whale. [5] The NOAA Vents Program has attributed Bloop to a large icequake. Numerous icequakes share similar ...

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