enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. List of sirens built by Alerting Communicators of America

   en.wikipedia.org/wiki/List_of_sirens_built_by...

   Three sirens in this line up: T-128, T-135 AC, and T-135 AC/DC The T-135 AC was known as ACA P-50, the name was changed after ACA's bankruptcy. The T-135 AC/DC is a siren that is bigger and more powerful than the T-128 and has a similar design and also has a battery backup system. This was introduced around 2007, replacing the T-135 AC.

3. Civil defense siren - Wikipedia

   en.wikipedia.org/wiki/Civil_defense_siren

   Most newer (and some older) electronic sirens have the ability to store digital audio files. These audio files could be custom sounds, or emergency messages. [14] Depending on the situation, the stored sound file can broadcast through the siren. [15] These sirens could also come with a Microphone Jack to broadcast live messages via microphone. [16]

4. ATI HPSS - Wikipedia

   en.wikipedia.org/wiki/ATI_HPSS

   San Francisco, California - This system is unique featuring the sound of the decommissioned Federal Signal STL-10 sirens that the HPSS units replaced; Casitas Dam, Ventura, California - This system is unique as they look like the Federal Signal Directional Speaker Array (DSA) sirens, but can have 7–8 speakers per stack, and gray caps on the speaker cones.

5. Siren (alarm) - Wikipedia

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

   In a pneumatic siren, the stator is the part which cuts off and reopens air as rotating blades of a chopper move past the port holes of the stator, generating sound. The pitch of the siren's sound is a function of the speed of the rotor and the number of holes in the stator. A siren with only one row of ports is called a single tone siren.

6. Tennessee tornado sirens failed to sound in storm that ... - AOL

   www.aol.com/tennessee-tornado-sirens-failed...

   Since 2003, such sirens have been used in the state to alert residents to imminent danger from tornadoes.. In 2013, a $2m grant was provided to the Nashville county to upgrade the system with new ...

7. Federal Signal Modulator - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Modulator

   A Federal Signal Modulator siren in Bay Head, New Jersey.. 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.

8. Warning sirens sound as multiple tornadoes touch down near ...

   www.aol.com/warning-sirens-sound-multiple...

   Warning sirens could be heard ringing out in downtown Chicago as multiple tornadoes touched down close to the city on Wednesday 12 July. The eerie sound could be heard in footage posted by Twitter ...

9. The tornado sirens went off in Port Washington on Tuesday ...

   www.aol.com/tornado-sirens-went-off-port...

   For premium support please call: 800-290-4726 more ways to reach us