this is loud

[german_siren]

turn the vlume down because its so damn loud...http://www.youtube.com/watch?v=JC51070j3us
Those are damn loud fire alarms. how loud can they be?

[carexpertandy]

http://www.youtube.com/watch?v=JC51070j3us

Next time, make sure you have nothing else touching the link, or it won't highlight.

[3t22]

the alarm heard is a Siemens U-MMT. I have one and yes it's among the loudest electronic alarms I have when set in either temporal code-3 horn or continuous horn as heard in the video. I believe they're rated 95-100db @ 10ft I'll dig out the paperwork and double check. The reason it has to be so loud is to comply with fire codes regarding alarm db level vs ambient noise level in the area of install.

I'll say this, nothing gets the heart pumping or your attention faster than the loud buzz of an AC vibratory horn, like a Federal Vibratone 350, IBM/Simplex 4030 series horn or an Edwards Adaptahorn.

[german_siren]

wow they are really loud then must be arround 105 db on 1 metres.
and yes horns pay most attention but here in germany we have fire alarms that get attention too.

[german_siren]

the ambience is great. not like in the other fire alarm videos. the room is dry,the "sirens"have great penetration and are really lound.

[sirenita]

I once heard these going off at a mall in arizona due to system problems. the video didn't do it justice imo! there's a great "bass" like component it didn't pick up.

[german_siren]

it must be the vibrations of the speed frequency of the beebs or warbles in a second. they have also a nice frequency cutof of the siren code. i think this piezo buzzers in there have a great sound.(when you put one outside and test it lol)

[bwillcox]

The horn in these isn't a piezo. It actually looks more like a small speaker element like would be used in a set of headphones.

Take a look at this closeup and you'll see what I mean. (It was shot with a phone camera so its out of focus but you can see the horn pretty well)



They definitely are loud, and they definitely get your attention, even in temporal code like the system this horn/strobe is part of.

-b-

[german_siren]

i think this diaphragma is in contact with a piezo disk. just look on the buzzer...

[german_siren]

3t22 you said this is one of your loudest fire alarms wich one is your loudes(ill just know)