"Please adjust volume so that my talking sounds normal" Lucky I had my cursor hovering over that mute button, just in case. That would have blown my ears off.
Wanna make it louder? Make or buy a blower, even a shop vac and force it into the intake making positive pressure, aka "supercharging the siren" this is the method of the Federal Signal Thunderbolt and ACA Hurricane
Or attach it with a air funnel to the big-ass bumper on my truck. Let's see how loud it is at 60 MPH!!!! Now SUBSCRIBE ALREADY PEOPLE - Has this man not done enough cool videos YET to earn your subscription? What are you waiting for, a scroll sawed, personalized invite?
Bradley Brand That wouldn't generate near the same sound pressure. Blowers such as those generate over 250 CFM of airflow at over 9-10PSI. Uncompressed free air wouldn't work that way with your truck.
+Max Glick Oh no don't dare try it with head phones. It's frightening as it is on Bose Comanion 5 speakers now with a head set? Unless people want to scair themselves mindless.
I'm sure his neighbors just love him to pieces... I love the homemade air raid siren, but I won't try to repeat his efforts, as I live in the city, and don't like meeting the police that much...
ok .. so i have this pretty sweet sound system .. i normally have the volume on 12 .. when you asked to adjust it , i put it on 76 , sounded like normal .. then WTF OMG JEEEEEZUS !!!!!!!! i think i woke up the neighbours !!!!!
It's funny how he was like "turn up your volume so I can hear my voice," and I was like "nah," and then turned down the volume instead. About as loud as expected
In order to make it louder, you need to match the acoustic impedance of air. You can do this by adding horns that convert the low impedance output of the siren to the high impedance of the air. Once matched, the power transfer to the air will be far more efficient and that 1.2kW will be absolutely deafening!
G3RMANARMY 1200W is equivalent to the sound of a medium DJ system, but those have to produce a lot of bass frequencies. If it were putting all of that energy into two sounds which contain most of their energy in the middle of the audio spectrum for human hearing where it is most sensitive, then it would sound orders of magnitude louder!
or, ... Place a Microphone beside the siren, now, Conect to amplifier, then to another amplifier, then to another, then another, all set to -0DB (from -DBs) then another amplifier, now connect atleast 2 1200Watt speakers, This will burst the ground of loudness >_
So impressed with your skills in many arenas. A man after my own heart. I can see you've built almost everything custom in your shop, too. I used to build pipe organs, was the cabinet maker, so have a deep appreciation for what you do. Thanks for sharing everything you share.
It is a much less offensive note, thats for sure, although, sirens are meant to be offensive to the ears, so I suppose that should be expected. Man, that note is so close tho... I bet a 7/10 would give you that fear of god feeling a siren is suppose to give you :P
No idea why this guy set a trap at the end of the video, but don't turn your speakers up when he tells you to.. Turn them down until you can barely hear him talk.
He tells you to turn it up so you can hear him talk, then turn it down before he switches the alarm on. I don't see how it's a trap if he's in a small space with a loud machine and puts on ear safety equipment, saying "Okay, here we go."
Him putting up ear protection was somewhat of a give-away that it might not be very clever to turn up your volume to listen to this. After all, an air raid siren was designed to be bloody loud. You were supposed to hear it from quite the distance away, because you know, air raid and all that.
Awesome! As I recall, the real ones had a horn assembly that was driven to rotate slowly to scan the horizon to increase the sound level to make distant listeners notice the sound. Keep up the great work! Arlen
Watched this video when it first was posted, even with the volume way down the noise woke my dad up from a sound sleep...three rooms away! Sound is really amazing thing to study...{both sound & light}
An "alarm" is sounded by raising and lowering the pitch (a sound we have all heard on many WWII movies). The "all clear" was given by keeping the same pitch.
I see that evil little smirk. uh-huh. It's like what if Rick Moranis was an inventive crafty geek with an evil prank streak SO busy fighting off all those delicious prank thoughts. I get it. Your sense of humor is the BEST! And the siren is awesome!
The audio is omni-directional coming out. If you put some kind of horn to help make it uni-directional you'll get a lot louder of a sound. Thats why air raids have horns, to direct all of the sound in one direction at the same time helping amplify it.
You may be able to amplify it by turning it into a compression driver. Enclose it with a forward facing aperture - located in the center in line with the motor shaft is fine - and then make a simple box horn to act as a megaphone. You're only interested in volume, not fidelity, so no need to muck about with flaring or anything fancy for a first pass. A compression driver has a smaller opening that the actual driver (hence the compression) so the aperture having less area than the total area of the open slots at any time ought to provide the desired results. Really loved the videos on this, many thanks, very inspiring!
When I saw the look in your eyes as you were putting on your ear protection I immediately turned my volume all the way down. Hahaha otherwise I would have had my eardrums blown out. That was so funny!!!
just "no"? can you please explain to me how yours is different, in essence, from these horns? www.directindustry.com/prod/klaxon-signals/high-power-sirens-15275-954623.html now, don't get me wrong. the fact you built this by hand and with wood is very impressive indeed. i'm not trying to take away from that. just wanna know the difference between yours and a klaxon.
***** The siren your link leads to is a Klaxon brand Siren. Confusing, possibly, but both are sirens, and not klaxons. A klaxon uses an electromagnetically oscillating plate to create its sound, I believe
Jim H ***** Original Klaxon-brand sirens used a steel diaphragm struck by the teeth of a spinning cog. They also used horns for better impedance matching. They are known for producing that "ah-oog-ah" sound you hear in old submarine films.
I grew up in central Oklahoma. That was the sound we got every Friday at noon during tornado season. And during actual tornadoes, but those were a lot less common.
