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  2. Emergency vehicle equipment - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_equipment

    A fire truck uses an air horn to alert cars of its presence. Air horn - These devices force compressed air from the vehicle's air brake system against a diaphragm, creating a loud noise. Air horns used on emergency vehicles usually have a distinctive tone so they can easily be distinguished from other large vehicles, commanding urgency.

  3. Air horn - Wikipedia

    en.wikipedia.org/wiki/Air_horn

    An air horn is a pneumatic device designed to create an extremely loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm. The stream of air causes the reed or diaphragm to vibrate, creating sound waves, then the horn amplifies the sound making it louder.

  4. Vehicle horn - Wikipedia

    en.wikipedia.org/wiki/Vehicle_horn

    A horn is a sound-making device installed on motor vehicles, trains, boats, and other types of vehicles. The sound it makes usually resembles a “honk” (older vehicles) or a “beep” (modern vehicles). The driver uses the horn to warn others of the vehicle's presence or approach, or to call attention to some hazard.

  5. Siren (alarm) - Wikipedia

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

    Fire horns, large compressed air horns, also were and still are used as an alternative to a fire siren. Many fire horn systems were wired to fire pull boxes that were located around a town, and this would "blast out" a code in respect to that box's location. For example, pull box number 233, when pulled, would trigger the fire horn to sound two ...

  6. Video shows shocking moment high-speed train collides with a ...

    www.aol.com/news/video-shows-shocking-moment...

    Shocking video showed the moment a speeding passenger train slammed into a Florida fire truck that drove past a warning gate onto the tracks, injuring 15 people, including three smoke eaters.

  7. Fire alarm notification appliance - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_notification...

    The standard fire alarm sound used in most of North America. Coding refers to the pattern or tones a notification appliance sounds in and is controlled either by the panel or by setting jumpers or DIP switches on the notification appliances. The majority of audible notification appliances installed prior to 1996 produced a steady sound for ...

  8. Old English Sheepdog Who's Obsessed with 'Great British ...

    www.aol.com/old-english-sheepdog-whos-obsessed...

    Ohhh we get it. The dog is probably tantalized by all those delicious treats. Captain is probably imagining all of the contestants slipping him some of their various dishes.

  9. Airbnb user fumes after company refuses to cancel booking ...

    www.aol.com/news/airbnb-user-fumes-company...

    An enraged traveler claims Airbnb is refusing to refund and rebook her after she attempted to cancel a vacation rental near the danger zone of the Los Angeles wildfires.. The rental firm has ...