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2. Fire alarm notification appliance - Wikipedia

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

   European Siren for fire detection system. A fire alarm notification appliance is an active fire protection component of a fire alarm system.A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.

3. Fire alarm system - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_system

   A fire alarm control panel Fire alarm speaker and pull station. Fire alarm systems are composed of several distinct parts: Fire alarm control panel (FACP), or fire alarm control unit (FACU): This component, the hub of the system, monitors inputs and system integrity, controls outputs, and transmits information.

4. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   In the 1960s, an electric-amplified version of the megaphone, which used a loudspeaker, amplifier and a folded horn, largely replaced the basic cone-style megaphone. Small handheld, battery-powered electric megaphones are used by fire and rescue personnel, police, protesters, and people addressing outdoor audiences.

5. Your Summer Called: It Needs One of These Outdoor Speakers to ...

   www.aol.com/summer-called-needs-one-outdoor...

   Then you'll want to invest in a quality outdoor speaker that will help you set the mood with the perfect soundtrack. Your Summer Called: It Needs One of These Outdoor Speakers to Amp Up the Vibes ...

6. Powered speakers - Wikipedia

   en.wikipedia.org/wiki/Powered_speakers

   An active full-range loudspeaker. Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers facing the audience and the monitor speakers facing the performers; by DJs performing at ...

7. Siren (alarm) - Wikipedia

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

   Most fire sirens are single tone and mechanically driven by electric motors with a rotor attached to the shaft. Some newer sirens are electronically driven speakers. Fire sirens are often called fire whistles, fire alarms, or fire horns. Although there is no standard signaling of fire sirens, some utilize codes to inform firefighters of the ...

8. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   Local alarms do not include monitoring, but may include indoor and/or outdoor sounders, such as motorized bells or electronic sirens and lights, such strobe lights which may be useful for signaling an evacuation notice during fire emergencies, or to scare off an amateur burglar quickly. However, with the widespread use of alarm systems ...

9. Federal Signal Modulator - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Modulator

   Federal Signal Modulators (also known as Modulator Speaker Arrays) are electronic warning devices produced by Federal Signal Corporation that are used to alert the public about tornadoes, severe weather, earthquakes, fires, lahars, tsunamis, or any other disaster. They are identified mostly by their distinctive stacked "flying saucer" design.