Fire Alarm Music

[Brinda]

Alsowhat would be the best way of doing this. I was thinking of a small box with XLR ins and outs that switches off when power is applied/removed or when a panic button is pressed. What kind of signal should be used to activate the relay? A standard iec inlet?

Fire alarms give out 24VDC to bells and sounders, so you need a 24V interface relay off the alarm. Some alarms need terminators on their bells but if you have a relay in parallel with an existing bell, this will be present in that. You're probably best getting the alarm company to provide a feed (and possibly the relay too) to the amp room so that you don't negate any Fire Alarm approvals by a DIY job here (in case what you do affects the alarm..either physically or on paper!). Fire alarms are to BS and the installation as a whole must comply, not just the panel.

General practice is to use the N/C contact on this slave relay as a maintainer on a 240v or 415V contactor that feeds the amp or amps, so that in the event of the sounder actuating, the mains contactors are de-latched by even momentary activation of the fire slave relay. You can reset the amps by pressing the 'start' button on the contactor box once the fire alarm is muted or cleared.

The use of a contactor like this is required by many local authorities in clubs in particular where the internal sounders may be obliterated by music. It's common sense anyhow, and any venue owner who's into this risk-assessment thing will no doubt have considered it. I've worked in many venues that don't have it, and many that do..so I suppose it can't exactly be required by statute as such.

If you have an installed PA then this can be muted in case of alarm with a priority paging nic for crowd control. If the power is cut then you have no way to address the assembled punters. If the power is cut then you must have a switch on sequencer installed or the alarm being turned off will ping most of your speakers.

Remember that in most venues the ratio of false alarms to real alarm situations will be in the order of 100:1 add in some (weekly?) alarm tests and a power off contactor is all too likely to be what costs you a complete set of speaker drivers at an inopportune time. A signal muting circuit will cause less damage.

When I worked in a Leicester Square venue the procedure for a fire alarm was full evacuation as the punters were standing, -leave coats and bags behind. The procedure for a terror alert was for all punters to collect their coats and bags from the cloakroom and return to their seats. This was to reduce the number of coats and handbags to be searched as suspect packages and also because there was sometimes a two device threat where there may be a second device in the fire assembly area ready to attack the punters as they filed out of the premises.

Seems like a Formula Sound Guardian Mk2 is what you need. It will interface with your sound system (at line level) and yourf fire alarm system. When the alarm triggers, the programme level is reduced but a mic priority channel is provided.

Ok can I bring this down a bit to this scenario. In a school/hall/club/etc. The PA will be there for a night probably on a basic wet hire for a band night etc. Any integration with the existing fire alarm system will most likely be out of the question due to cost/hassle. What would you suggest? How about the operator just pulls down the master faders? Actually now I think about it, that seems the most sensible solution.

This ain't Hampden Park we're talking about, it's about a hundred folk coming to see a band at their local. Are the regulations so tight that even then I would have to bring in a fire engineer to hook me up and thoroughly test and risk assess the whole system?

When I worked at a large national holiday resort (think 'Redcoats'), we used 'Allen & Grief' DR8 zoners, which connected to the fire alarm circuit via the 9-pin D-sub on the back of the unit. The fire alarm company installed and provided the 9-pin D-sub for us to connect to the appropriate equipment. And when the zoner goes faulty - which it often seemed to do! - you can simply unplug it , and plug the alarm mute plug into the replacement unit.

We once had some Ibiza DJs in for an adult weekend, and they were driving the system so hard that a brand new set of twin 18" cone 800W subs caught fire! The noise from the 3000 people was so loud that even once the fire alarm had been activated and the music was cut, it took a few minutes for the pi$$ed-up punters to realise!

Instead of using the zoners, if your sound desk has 'Master Inserts', you could (as a bit of a project) link these to a relay's NC contacts, so that they break the circuit upon activation, and you could include an 'Emergency Announcement Mic' wired to the relay's NO contacts... But as KevinE has mentioned, the whole fire alarm needs to comply with all relevant regs, (National, local and venue-specific), so you'd need to look into this properly, and almost certainly get your alarm company to install the relay unit at least...

What is sometimes instaled in smaller venues is a number of mains sockets (13 amp and/or 16 amp ceeform) these outlets are normaly live, but are isolated via a contactor if the fire alarm sounds. Any noise making equipment should of course be powered from these outlets.

In normal mode (not triggered by the fire alarm) the signals pass through the four channels without attenuation. When the unit is triggered - usually by a fire alarm - the music level is attenuated. In order to avoid panic, it has been found that the music should be attenuated rather than cut altogether, so this is exactly what the CX4 does. The level of attenuation can be adjusted using the controls hidden under the front panel.

This is a secondary function that is included with the CX4. It allows you to set a maximum permitted sound level in an entertainment venue. The unit monitors the level in channels 1 and 2 (the main program channels) and if it goes above the threshold then the LIMIT indicator lights up and the level is attenuated back to the threshold.

The CX4 is a 19" 1RU unit, and so fits well with other standard 19" units. It connects between the mixer (or pre-amp) and the power amplifiers. It can be connected to four channels of audio, usually two stereo pairs.

The priority input, which can be a microphone or line level source, connects to the "priority input" socket. This can be a microphone that is in general use, which then becomes the priority mic. for any safety announcements if the fire alarm is triggered.

It should show up on the screen when it is occurring, and if you check notifications, you should see what it is as well. Most of them will remain in Notifications until you remove them. However, the first time you ever hear that sound, there will be no doubt in your mind what it is, especially if you are somewhere where you don't want it to sound, i.e. church, work, etc..

OMG, the same thing just happened to me. I was so scared. The first thought that came to my mind was that I was somehow hacked. But there was a little smoke in the kitchen, I'm just not sure why or how it could be played through my phone.. I checked what played the noise and it was somehow a website with the url as "us.hankie796jf.pw".. im not sure if it could be a virus or what. I hope apple knows something

Is it very possible that you have Government Alerts activated on the iPhone? Check Settings>Notifications>Government Alerts. If there is an emergency alert such as a flood warning, severe weather warning, or an Amber warning, you will get those, and they sound whether the device is on mute or not, and the volume is set to high and cannot be changed.

I assumed that was the case and seeing it on the screen certainly makes sense, so why neither OP saw anything is a bit of a mystery. I have yet to experience this myself. I suppose I will know it now when I hear it.

My wife and I were driving down the road in an area where they were experiencing creek flooding conditions in the rural areas, and both of our phones went off almost simultaneously. It scared the you know what out of us, and I almost put us in the ditch! It is very unnerving.

I believe I remember reading something about this Chive app and a problem they experienced. I believe they have issued an update to fix that. Check to see if your app has an update, and you may wish to check with the app developer.

This just happened to me today. It was extremely loud and I thought it was a real fire alarm. I read some stuff online and a lot of people are linking it with the use of an app (ifunny, mostly, but I wasn't using this app nor do I have it). I was wondering if you were using any specific apps when this happened to you. Mine showed that it was playing from some website called gigroity.info ... this is not a website I had up. I closed out all of my apps immediately, but didn't look to see what app officially closed the sound. I was able to pause the sound when the little iTunes logo thing showed.

I did some things I haven't had it since my last post. First there is an app that's allowing ads to make this sound. In my case it was the Grindr app. I have emailed them many times. I hope they stopped those ads. Secondly, I think if you double click home button and close the app manually each time, the ad won't make the noise because the app is not opened in the background to allow it. I hope this helps. Let me know if this helps u so I can confirm that's the solution.

I just experienced the same thing. The beeping lasted for about 10 seconds and then abruptly stopped. I was on Instagram. I am certain that it was not a government alert as I was looking at my phone while it was happening.

This is not something from Apple. At least with the information that you provided this time, it is a little easier to get to the bottom of this. Seems that this IP address belongs to a company by the name of Linode (www.linode.com). It seems from the balance of my search, that it is a company that is a cloud hosting service for developers. That would make one believe they are providing something for an app that you may have on your device. It may be rather difficult to trace that in the App Store, since it does not appear they are the developer, but rather just a hosting service. Given the extreme number of apps and/or games available, it may be hard to determine what app all of the posters here may have in common. But, that seems to be where it is coming from.

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