Inspired by the tornado siren that accidentally went off early Tuesday morning in Hennepin County, John Lauritsen answers a Good Question about how those life-saving alarms work (2:45). WCCO 4 News At 10 - April 12, 2016
The sirens work by a chopper or a speaker siren the chopper sirens chop the air shot it out of vents and makes sound waves the speaker siren works by a speaker
*Siren In This Video Marking Each Point To Where You Can See And Hear Them* 0:39, 2001 D.C 0:41, Reverse Wired 5/6 Port Thunderbolt 1000T 0:44, RSH-10 Thunderbeam 0:49 4/5 port Thunderbolt 1000T 1:38 Reverse Wired ACA Allertor 1:52, Model 7 & 2001 - 130.
When I was in elementary school, they had a tornado siren situated right next to our school. Every Tuesday it would go off at 10 am. It was a little scary at first, but eventually you got used to it. There was another one situated on the other side of town right next to another elementary school, too.
There are 2 different types of sirens 🚨 There are electric sirens And Non-electric Sirens. The Non-Electric Sirens are powered by a Fan. The fan spins so fast that it chops up the air which causes a high Pitched noise what we call a Siren noise. But There are some sirens that are electric ⚡️ The electric sirens are sirens that do not have a fan. They are programmed to make a high pitched siren noise. Solenoids :) Sometimes sirens can make a hi-lo noise or a pulse Noise. To change the tone of the siren, Solenoids block the air which blocks the noise. Hi-lo is when one solenoid blocks the air and then the next. Pulse is when 2 Solenoids go at the same time. 🌪🚨 We all know some ways the sirens work, But most sirens are turned on by you’re city, Some state test their sirens at different times. Most sirens are tested by the city 🌃 And those are a few things I know about Tornado sirens 🚨 #Sirens #Solenoids
They're technically all electric since their motors are usually powered by electricity (with a few exceptions). The sirens that don't use fans/rotors use speakers.
Preset tone patterns are usually put into the sirens during testing, usually in the mornings at 10am at most municipalities. Here are the sound-tone patterns for the test siren activity: The first test firing is the plateau-tone pattern, usually for several minutes. (That is the glissando up, then a steady tone, and then a glissando down to end the sound.) Then there is a break for about 1 or 2 minutes, and the test-firing happens again in test 2. The second test firing is the multiple-sine-wave-tone pattern (the several waves of glissandos up and down), also for several minutes. Tornado siren emplacements are either this option - fixed emplacements (where the sound structure on top does not move when the siren is fired), or rotating emplacements - where the top part of the siren, like a Leslie pre-amp fan on a Hammond Organ, rotates when the siren activates. The siren stops rotating when the sound stops. The tops of those sirens are usually in a hyperbolic shape for maximum output of the siren din for maximum reach so that scores of residents/people can hear the sirens and take action if needed.
This is just like the fire alarm at school going off, and then somebody in the school's main office getting on the PA system, saying that there's no fire.
Although the message regarding the False attack came across the wire service and not knowing it was a false alarm WCCO followed proper procedure when the specific message came across.
The sirens in that city are called the ACA Allertor 125. 2001 SRN. Thunderbolt 1000T. RSH10. Here is some videos of the sirens sounding. Notice: these videos are not in the same place. RSH10.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DFIyoTdaSlM.html Allertor. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-AHAJhJiLNCU.html Thunderbolt.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-d9rRSY0dRIU.html 2001. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6ndcP-fcvVo.html
Mackenzie Ryne Bagtong you can switch off subtitles in settings if using RU-vid app Tap the 3 dots in the top right hand corner then tap Captions and then tap Turn Off Captions and once you do that a ✔️will appear next to those words
We need sirens for infectious disease warnings, and that should be actived using a switch that the public can use, for if they find themselves with an infectious disease spreading from person to person.
There are different kinds of sirens the two kinds I know electrical and electro-mechanical. The electrical sirens use speaker drivers The electro-mechanical ones uses a stator, motor and a chopper so the chopper is connected to the stator a shaft is used to connect the motor to the chopper. The chopper and stator have rectangular ports that act as doors for air to go throungh thats how they make there always has to be a way for air to get to the chopper by a intake or a blower most electro-mechanical sirens have horns (not like air horns). There are also rotational sirens and omnidirenctional sirens, most rotational sirens have a rotator box and some don't. Omnidirectional sriens can send their sound in all directions without spinning.
“They want us to take them seriously” If I hear a tornadoe siren going the fuck off and it’s not Wednesday and it’s sunny and beautiful out, best believe I am NOT 🤣”taking cover” or “taking it seriously”
