My dad was a little child in WW2 and was living in Berlin so he heard the Air Raid Sirens quite often. I don't want to imagine how scary that must have been for a child. Those sirens creep me the fuck out.
creepyendy Now ours, It depends on a local agency known as Emergency Management Agency (Used to be Civil Defense) They get to choose when they want to test them. It's usually on Sat. We have a crappy Whelen 4004/Vortex R4 (Can't tell which one is. They both look the same)
keiner will hoffen das dieses signal je benutz wird,,, aber das ist der sound den ich gesucht hab eine tiefe sound sirene. danke fürs upload wie von allen anderen uploads Thx e57michel mach weiter so
@Z32spdstr The ball bearings are designed for long life. It is generally very important for electro-mechanical sirens. Sirens have to run reliable in every situation to warn people in case of danger for them around the clock, in any weather condition.
Before WWII, these low-pitched sirens were used for fire calls, while higher-pitched sirens were preserved for civil defence use. Many were combined into a single siren with two motors and two rotors, but after the war, only the high-pitched ones were used.
@cld458 yes, with two seperate engines: one for the low-tone (like shown in the vid), the 2nd for the high-tone. (look for the vid: Luftschutzsirene Weltkrieg, old german airraid-siren) each engine has the power of 4 kW (total 8 kW)
@Z32spdstr this siren-rotor in the video has the maximum of approx. 2800 RPM. (because of the 400 V 3-phase AC-engine at 50 Hz power frequency and it is a "star connection") i´m sure it could run faster only in a short time with a "delta connection". but the AC-engine wouldn´t survive this!
the rpm´s are the same for all electro-mechanical sirens with an engine of 400 V AC. it is approx. 2800 rpm. but the different sizes of the air ports makes different siren-tones: low tone with 145 Hz has 3 air ports (this siren type like in the video, or L138, S145, S4) high tone with 420 Hz has 9 air ports (e.g. german E57 sirens, Elektror L1, L141) or high tone with 530 Hz has 11 air ports (e.g. Elektror S3,S4, L138)
Yes, I once transported an old man in the ambulance who ducked in fear when the air conditioning switched itself off and made a siren-like sound when the ventilator spun out. When I asked him about it, it turned out he had survived the apocalyptic air raid on Pforzheim on February 23rd 1945; his mother and sister were less lucky, and his father never returned from the Russian frontlines. This man knew, what war really means...
Looking at the inside from the minimum amount of light you can see, it looks like a large fan forcefully hitting the sides of the metal, creating the loud sound.
Im no expert, and Im just making an educated guess, but you are close. Its the blades forcing air through the slots at a very high velocity, causing the metal to vibrate, The discs are there to amplify the noise of the vibrations.
They work like this... Sirens are just giant air horns. What they do is they suck in air using the spinning thing called a chopper. It's like when a gap opens and closes with rushing are which makes a whistle except with sirens it sucks in the air with the chopper and chops the air while the gaps open and close because of the metal on the chopper. The gaps are also called ports. So they suck in air and blow it out through gaps that open and close at a EXTREAMLY rapid rate. This is the best I can explain it but there are other informational videos you can see
@TeachMehDoug ANSWER: it is a simple fire-siren for today! and i don´t know if this siren warned somebody in times about 60 or 70 years ago. But I suspect that this siren has done this job. that is the purpose to hurt the ears of many people, so you will stay alive in war-situations or in case of fire!
Wow, that rotor just keeps going...and going...........and going........okay, this is getting annoying........and...going........and going........ oh look I finally see the indivivual blades..........and going........................hey, it stopped. :D
@Blaulicht500 das ist auch ein mords apparat vom durchmesser her. die lagerung wird sogar noch extra gefettet mittels vorhandener schmiernippel am sirenenmotor. ist schon eine sehr beeindruckende alte luftschutzsirenen-bauart!
@TheFilmkoenig der rotor: er erzeugt mit hoher drehzahl (ca.2800 U/min) in zusammenwirken mit dem stator den typischen lauten sirenenton einer elektro-mechanischen sirene. natürlich spielt die luft in der umgebung vertreten die schlüsselrolle (ohne luft würde es auch keinen ton geben): sie wird durch den schaufelrad-ähnlichen rotor angesaugt (hier von oben) und seitlich durch die vorhandenen stator-ports herausgepresst. das sirenendach strahlt den ton nach unten ab. mal grob erklärt! ;-)
@TheGondorian so nebenbei: die DS977-aufnahmen eurerseits sind ebenso sehr gut gelungen! (diese sirenen-art in aktion fehlt mir auch noch in meiner sammlung! werde irgendwann mal einen angriff starten, solch eine aufnehmen zu können.)
@Z32spdstr i´ve forgotten to remark: The ball bearings still get an extra lubrication from a outside grease nipple to increase their life. thats a special feature for this siren-type.
There are some folks out there who would hear this today and shiver, or worse, go into a panic state, just from associating the sound with what happened the last time they heard it. It gave me the shivers to think about what the sound is symbolising...
I have BF4 and the only sirens that go off that I know of are on Carrier Assault, and the bomber in China Rising, and even then they're high pitched ones.
Die braucht ja verdammt lange bis zum Entgültigen Stillstand. Scheint wohl sehr leicht zu laufen bzw ein schwerer Rotor zu sein, oder liege ich da falsch?? Dies ist aufjedenfall wieder eine sehr schöne Aufnahme. Vielen Dank fürs Hochladen, Michel. Daumen hoch!!
Lol i used to be freaked of sirens now i love them. This one actually is pretty scary because you dont hear an old ass air raid siren like this that deep. This is provably the only one of its kind. Ive never heard one lower than this one. This is similar to the french sirens. The sound.
Wenn ich das richtig verstehe hatte dieser Sirenentyp ursprünglich mal 2 Rotoren in unterschiedlicher Frequenzausführung, oder? Hast du Infos wieso der andere ausgebaut wurde? Geiles Teil auf jeden Fall, ein echter Dinosaurier :-)
Nice video! Thank you Michel. Years ago I told Federal Signal to offer a Q siren with 1/4 the ports they now have. Peak frequency would be two octaves lower.Lower frequencies travel farther through air and penetrate vehicles better.
Imagine during ww2 as a kid you woke up hearing that and knowing well what that meant
My dad was a little child in WW2 and was living in Berlin so he heard the Air Raid Sirens quite often. I don't want to imagine how scary that must have been for a child. Those sirens creep me the fuck out.
Germans have good air raid sirens.
***** of course, no doubt about it ...........
e57michel I know. I want to see some of their Electronic Air Raid Siren.... Can you send me one link of it?
thx im from Germany every Sunday they tested them
creepyendy Now ours, It depends on a local agency known as Emergency Management Agency (Used to be Civil Defense) They get to choose when they want to test them. It's usually on Sat. We have a crappy Whelen 4004/Vortex R4 (Can't tell which one is. They both look the same)
+e57michel I wish Americans had sirens like that.
This gives me the chills..
Dang, Germany. Your sirens are almost as scary as the ones here in America...
Id say its way scarier
What about British air raid sirens? 😮
British have to be the most terrifying I've heard
Chris Wheatley Turns out America does. Look up 'Chicago tornado sirens'.
This sounded... YAY!!!!!!
this is more creepy than the actual ones.
the way it sounds like. in WW2, that meant do not play around. plus, it kinda gives me the chills since its low.
this tone is so much deeper than a thunderbolt 1000t
Sounds like my ceilling fan
XDDD
+john hamlet Lol
+john hamlet I think I hear your ceiling fan when my siren sounds.
+john hamlet LOL
HOLY SHIT HAHAHAHAHHAHAHAHA
3 ports. That is just insane. I love it.
Beautiful sound, beautiful siren... :D
I think I'd cry if I heard this siren irl.
Must be crazy back then. Just imagine, waking up from this sound back then in the middle of night in your sleep as a teen. Worst nightmare ever.
yes, there are some several descriptions of this scary siren sign: alarm, attack, warning, warnung, air raid signal, wail-tone, etc..
its a loud cow
LMAO
Shorne xox lol
More scarier then the actual enemy
as a volunteer firefighter i would love for this to be our house siren
keiner will hoffen das dieses signal je benutz wird,,, aber das ist der sound den ich gesucht hab eine tiefe sound sirene. danke fürs upload wie von allen anderen uploads Thx e57michel mach weiter so
Justin Bieber is in the town.Evacuate town!!!!!x5
Haha 😂😂😂😂
that was actually funny lmfai
of course. i own the same siren-type contructed in times of WW2. soon i will show my old deep-tone siren in a video.
i'l love to hear this thing at a distance with an eerie echo
@Z32spdstr
The ball bearings are designed for long life. It is generally very important for electro-mechanical sirens. Sirens have to run reliable in every situation to warn people in case of danger for them around the clock, in any weather condition.
Before WWII, these low-pitched sirens were used for fire calls, while higher-pitched sirens were preserved for civil defence use. Many were combined into a single siren with two motors and two rotors, but after the war, only the high-pitched ones were used.
I feel bad for any Birds who take up residence in that thing...as for Squirrels well you're natures speed bump so go right on in
Fon't put your Finger in !
It's shifting to the otherworld!
@cld458
yes, with two seperate engines: one for the low-tone (like shown in the vid), the 2nd for the high-tone. (look for the vid: Luftschutzsirene Weltkrieg, old german airraid-siren)
each engine has the power of 4 kW (total 8 kW)
Sounds like a sick allertor.
Never heard a siren this low before.
@Z32spdstr
this siren-rotor in the video has the maximum of approx. 2800 RPM. (because of the 400 V 3-phase AC-engine at 50 Hz power frequency and it is a "star connection")
i´m sure it could run faster only in a short time with a "delta connection". but the AC-engine wouldn´t survive this!
the rpm´s are the same for all electro-mechanical sirens with an engine of 400 V AC. it is approx. 2800 rpm.
but the different sizes of the air ports makes different siren-tones:
low tone with 145 Hz has 3 air ports (this siren type like in the video, or L138, S145, S4)
high tone with 420 Hz has 9 air ports (e.g. german E57 sirens, Elektror L1, L141)
or high tone with 530 Hz has 11 air ports (e.g. Elektror S3,S4, L138)
Yes, I once transported an old man in the ambulance who ducked in fear when the air conditioning switched itself off and made a siren-like sound when the ventilator spun out.
When I asked him about it, it turned out he had survived the apocalyptic air raid on Pforzheim on February 23rd 1945; his mother and sister were less lucky, and his father never returned from the Russian frontlines.
This man knew, what war really means...
this reminds me of one of the maps in bf4 that had the sandstorm the siren sounds just like that one
Such a lovely, eerie sound!!!
that spin down time is amazing, it must be ridiculously free running
Diesen Sound kenne ich so noch nicht. Ist aber Cool, hier handelt es sich wohl um eine Tiefton Sirene.
Sounds like a Honda civic and a leaf blower having a contest on who sounds the most shittiest
Looking at the inside from the minimum amount of light you can see, it looks like a large fan forcefully hitting the sides of the metal, creating the loud sound.
it´s moving the air... every sound consists of moving air and here it´s simply a lot more and a lot faster...
Im no expert, and Im just making an educated guess, but you are close. Its the blades forcing air through the slots at a very high velocity, causing the metal to vibrate, The discs are there to amplify the noise of the vibrations.
They work like this... Sirens are just giant air horns. What they do is they suck in air using the spinning thing called a chopper. It's like when a gap opens and closes with rushing are which makes a whistle except with sirens it sucks in the air with the chopper and chops the air while the gaps open and close because of the metal on the chopper. The gaps are also called ports. So they suck in air and blow it out through gaps that open and close at a EXTREAMLY rapid rate. This is the best I can explain it but there are other informational videos you can see
BBoi00 00
i thought it was called an impeller
If it was not that rapid, it would sound like dun dun dun dun dun dun
We have sirens like that close to my home but their mainly used to alert us of tornados
then you will never ignore this sound. thats possibly good for your life for a long time........
@ohbobsaget22
nonsense to replace a full functionable (but old) siren. and besides it is in Austria.
@HotTop202
the siren-tone gets higher. check your mail for a sound-example!
@TeachMehDoug
ANSWER: it is a simple fire-siren for today! and i don´t know if this siren warned somebody in times about 60 or 70 years ago.
But I suspect that this siren has done this job.
that is the purpose to hurt the ears of many people, so you will stay alive in war-situations or in case of fire!
@ihaterabbits127
no, you aren´ t! it is the adjustment of my video-camera. nothing more.......
@cld458
no, the high-part! the low one is activ!
How'd you like to hear THAT in the middle of the night in the spring time in Oklahoma?
Wow, that rotor just keeps going...and going...........and going........okay, this is getting annoying........and...going........and going........ oh look I finally see the indivivual blades..........and going........................hey, it stopped. :D
That has to be the deepest siren ever! Nice vid! Wish we had unique ones like this in America nowadays..
@Blaulicht500
das ist auch ein mords apparat vom durchmesser her. die lagerung wird sogar noch extra gefettet mittels vorhandener schmiernippel am sirenenmotor. ist schon eine sehr beeindruckende alte luftschutzsirenen-bauart!
@lilaj34siren
thats a very good news:
what was the reason? a tornado or fire?
the siren made a good job (for you and for other human life!)
it is its natural frequency at special rpm´s of the big siren-rotor. then the whole siren begins to shudder or vibrate.
@Razerlikes
das sind immer und überwiegend sirenen-tests! was erwartest du denn noch???
@darkhound891
caused by: a well balanced rotor, 1st class bearings, processed by high-quality materials, very accurate manufactured siren.
@TheFilmkoenig
der rotor: er erzeugt mit hoher drehzahl (ca.2800 U/min) in zusammenwirken mit dem stator den typischen lauten sirenenton einer elektro-mechanischen sirene. natürlich spielt die luft in der umgebung vertreten die schlüsselrolle (ohne luft würde es auch keinen ton geben): sie wird durch den schaufelrad-ähnlichen rotor angesaugt (hier von oben) und seitlich durch die vorhandenen stator-ports herausgepresst. das sirenendach strahlt den ton nach unten ab. mal grob erklärt! ;-)
@Director84
so pump up the volume........
@TheGondorian
so nebenbei: die DS977-aufnahmen eurerseits sind ebenso sehr gut gelungen! (diese sirenen-art in aktion fehlt mir auch noch in meiner sammlung! werde irgendwann mal einen angriff starten, solch eine aufnehmen zu können.)
@Z32spdstr
i´ve forgotten to remark: The ball bearings still get an extra lubrication from a outside grease nipple to increase their life. thats a special feature for this siren-type.
@HotTop202
thx. :-)
There are some folks out there who would hear this today and shiver, or worse, go into a panic state, just from associating the sound with what happened the last time they heard it. It gave me the shivers to think about what the sound is symbolising...
pour a cold beer in your neck, then no more nightmares!
schütte dir ein bier in den hals! da hast keine alpträume mehr!
hey e57 did you know the xbox game battlefield 4 used this siren sound in their menu?
then show me..........
I have BF4 and the only sirens that go off that I know of are on Carrier Assault, and the bomber in China Rising, and even then they're high pitched ones.
***** you can hear it on the gulf of oman map during the sandstorm
I actually never noticed it before. Hopped in an empty server and heard it. A little higher pitched but sounds kinda similar. Nice.
Rainstorm derpy derpy deep u!
@SnappyPenguins
the location of this siren is in Austria..........
MoooooooMOOOOOOOMooooooooMOOOOOOOOO!!!!!!!
Sounds like a cow. :D
headache is much better than WW3!
It is in Austria, not in Germany!
Die braucht ja verdammt lange bis zum Entgültigen Stillstand. Scheint wohl sehr leicht zu laufen bzw ein schwerer Rotor zu sein, oder liege ich da falsch?? Dies ist aufjedenfall wieder eine sehr schöne Aufnahme. Vielen Dank fürs Hochladen, Michel. Daumen hoch!!
Wo kann man an alte motorsirene aus dem 2wk kommen?hätte gerne so ne tieftonsirene
I don't know why, but this sound give me shivers
Now that's a siren... Instead of the non motorized crap they have now
I don't know why but this fucking terrifies me ;-;
It terrifies you because its a air raid siren o-o not much to explain
callmekico The air raid sirens in some of the U.S States are more terrifying.
Lol i used to be freaked of sirens now i love them. This one actually is pretty scary because you dont hear an old ass air raid siren like this that deep. This is provably the only one of its kind. Ive never heard one lower than this one. This is similar to the french sirens. The sound.
That's an eerie and awesome alarm sound. I'm probably going to use this alarm sound in the movie I'm working on
@Lati4573
genauso isses. die hochtoneinheit nämlich. (gibt es auch ein video von, wo diese einheit aktiv ist.)
so becuase the air ports are bigger does it require faster or lower rpm's to operate?
@Z32spdstr
very easy to guess: it´s a motorcycle (80ccm)!
Wenn ich das richtig verstehe hatte dieser Sirenentyp ursprünglich mal 2 Rotoren in unterschiedlicher Frequenzausführung, oder? Hast du Infos wieso der andere ausgebaut wurde? Geiles Teil auf jeden Fall, ein echter Dinosaurier :-)
Die brummt aber seehr tief !
welche Frequenz hat die Sirene ??
soon i will present a collection of my own deep-tone-sirens. so you maybe will get more goose flesh......
don´t forget: unfortunately also for today, if there is war in some countries.
sounds like a Chrysler siren in a tunnel
That has to be one of the most disturbing man-made sounds I have heard in a LONG time.
Castle Castings siren- This one is what defined WW2 Air raid sirens for me.
Welches Baujahr ist der Heuler?
Wow das ist echt geil der raue Sound :D
@Z32spdstr btw is the fastest this siren goes? or can it go faster?
is the low part of the siren missing ?
was that a bike engine revving?
Nice video! Thank you Michel.
Years ago I told Federal Signal to offer a Q siren with 1/4 the ports they now have. Peak frequency would be two octaves lower.Lower frequencies travel farther through air and penetrate vehicles better.
assuming there are continuations of this film, i´d agree.........
I dont know why, but I found the sound of it winding down to be extremely satisfyling.
@Blazeheart114 The creepy thing about that is... EVERY city/town has one of those sirens & they're all operational.
145hz tone?
it sounds like my lawnmower
steht im info-text und bei den tags.
Originaly it is a two "sounds" siren. You can see that on the video. Low and high turbine. The low one is missing.
this siren is awesomly epic sounding
be glad you only hear it ..........
Very Cool siren, I have never seen that looks or sounds like this. It maybe would be worth some money.
was bewegt sich da drinne?
wenn ich mal fragen darf^^
If the siren is authentic, then it had a workload around it's early days!
I get the shivers when I hear this...the sound of approaching death
Da hat sich das Warten ja gelohnt ;-) Echt gutes Video.
I never want to see the day when any siren goes on and never turns off.