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2. Federal Signal Modulator - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Modulator

   The Concrete, Washington area has a system of eight 8032B Modulators to warn of possible breaches at the Baker River Dam. 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]

3. Fire alarm notification appliance - Wikipedia

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

   A Simplex-brand fire alarm bell. 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.

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. The 10 Best Outdoor Speakers of 2024 - AOL

   www.aol.com/12-best-outdoor-speakers-wired...

   Whether it's a mounted, wired speaker system or a portable wireless speaker, these 10 best outdoor speakers can withstand weather and play music on your patio. The 10 Best Outdoor Speakers of 2024 ...

6. Best outdoor speakers of 2023 - AOL

   www.aol.com/lifestyle/5-best-outdoor-speakers...

   Liven up your picnics, patio parties and more with these great-sounding weatherproof speakers. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

7. 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.