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  2. Federal Signal Modulator - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Modulator

    The system uses a distinctive "WHOOP" tone that was originally produced for Federal Signal's line of fire alarms. The system is tested on the second Monday of every month at 6:00pm. [6] Alaska has many Federal Signal Modulators and Eclipse 8s on their All Hazard Siren System. They sound for tsunamis as well.

  3. Fire alarm notification appliance - Wikipedia

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

    Voice evacuation systems (also called Voice Alarm Systems) have become popular in most countries. Voice evacuation alarms typically are not as loud as horns or bells (although generally standards require the same minimum sound pressure levels), and usually sound an alarm tone (typically a slow whoop, code-3, or chime tone, although this depends ...

  4. Long-range acoustic device - Wikipedia

    en.wikipedia.org/wiki/Long-range_acoustic_device

    The LRAD systems are expected to be installed by the end of 2019. [98] In October 2020, Laguna Beach, California, tested its expanded outdoor warning system of 13 Long Range Acoustic Devices mounted on buildings throughout the city. The solar-powered devices broadcast recorded evacuation messages in case cell service is disabled during a ...

  5. Fire alarm system - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_system

    A fire alarm system is a building system designed to detect, alert occupants, and alert emergency forces of the presence of fire, smoke, carbon monoxide, or other fire-related emergencies. Fire alarm systems are required in most commercial buildings.

  6. Motorola Minitor - Wikipedia

    en.wikipedia.org/wiki/Motorola_Minitor

    Amplified base unit - An optional "Charger/Amplifier" base can be bought. Bigger than the standard charging stand, the "Charger/Amplifier" base not only charges the pager, but has an external antenna for increased reception , an amplified audio out jack to drive a stand-alone speaker, and some models even incorporate a relay to activate ...

  7. 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 ...

  8. Alarm device - Wikipedia

    en.wikipedia.org/wiki/Alarm_device

    an alarm clock that sounds an alarm at a pre-set time, often used to wake a person up or remind them of an event. a fire alarm which is used to give occupants of a building early warning of a potential fire and give them time to evacuate. warning devices on a vehicle that sound when it is moving in an unexpected direction, such as reversing,

  9. Community Professional Loudspeakers - Wikipedia

    en.wikipedia.org/wiki/Community_Professional...

    Community Professional Loudspeakers is an American manufacturer of loudspeakers and sound reinforcement equipment.The company has been located in the Philadelphia area since its inception in 1968, and has occupied its present location in Chester, Pennsylvania since 1981.

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