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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. 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 ...

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. Home theater in a box - Wikipedia

   en.wikipedia.org/wiki/Home_theater_in_a_box

   A home theater in a box (HTIB) is an integrated home theater package which "bundles" together a combination DVD or Blu-ray player, a multi-channel amplifier (which includes a surround sound decoder, a radio tuner, and other features), speaker wires, connection cables, a remote control, a set of five or more surround sound speakers (or more ...

6. 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.

7. Nab up to 53% Off Outdoor Speakers Ahead of Your Labor ... - AOL

   www.aol.com/lifestyle/nab-53-off-outdoor...

   Labor Day is coming, which means it’s time to get your backyard party-ready. Right now, you can get up to 53% off outdoor speakers on Amazon and Walmart.