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Author Topic: Siren Types And Use  (Read 11808 times)

Offline Camo

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Siren Types And Use
« on: October 17, 2006, 06:23:13 PM »
Gday,

Just a question

What siren (wail, yelp or mix) do people use and where.

We use mix except when coming up to a busy intersection where we switch to yelp.


What are the thoughts of others?
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Offline SA Firey

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Re: Siren Types And Use
« Reply #1 on: October 17, 2006, 07:09:19 PM »
Depending on the appliance Camo wail for long straights and mix or yelp for intersections and heavy traffic.......and air horns for ones that cant hear :evil:
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Offline medevac

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Re: Siren Types And Use
« Reply #2 on: October 17, 2006, 08:42:15 PM »
mix and yelp give me the shits, so they are only used at intersections, wail is what we use for straights/long periods, and then theres also the london siren if things get boring...

air horns are great for giving slow traffic the right idea.
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Offline 2090

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Re: Siren Types And Use
« Reply #3 on: October 18, 2006, 01:56:23 PM »
Yeah, we have people that love to set the siren on mix and leave it there, but most other people who have half a brain use yelp for intersections/blind corners on narrow roads, and wail for the rest. Then you've got the electronic horn for intersections or stubborn drivers. As a last resort if you are bored there is still the Hi-Lo on one appliance.
« Last Edit: October 19, 2006, 03:10:56 PM by 2090 »
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Offline Darius

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Re: Siren Types And Use
« Reply #4 on: October 18, 2006, 03:25:31 PM »

jeeze you guys have obviously got the siren control somewhere you can reach it then!  On our 24 the on/off knob is on the lower dash but the one that varies the tone is behind the centre front seat (single cab) and you've got no hope of operating it while driving.
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Offline Camo

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Re: Siren Types And Use
« Reply #5 on: October 18, 2006, 03:58:14 PM »
yeah same but the person in the passenger seat can operate it.
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Offline Robert-Robert34

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Re: Siren Types And Use
« Reply #6 on: October 18, 2006, 04:49:35 PM »
Our refurbished appliance has the yelp,wail and mix siren control box but its right in the middle of the 2 seats so only the radio operator can use it

The first emergency call our refurbished appliance responded to which happened to be that scrub fire out at Wandilo we had the siren on mix  :lol: and it was really wicked cause it was a big change from our old siren box which just had yelp and wail 
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Offline backburn

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Re: Siren Types And Use
« Reply #7 on: October 18, 2006, 05:03:34 PM »
We use mixed, we used to change it if a vehicle would not get out of our way but our Capitan has said ours is to stay on mixed if they can not hear that too bad. So when he is not there we keep changing it on traffic conditions.  :-D
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Offline Camo

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Re: Siren Types And Use
« Reply #8 on: October 18, 2006, 05:36:43 PM »
Quote from: Robert34 on October 18, 2006, 04:49:35 PM
Our refurbished appliance has the yelp,wail and mix siren control box but its right in the middle of the 2 seats so only the radio operator can use it

The first emergency call our refurbished appliance responded to which happened to be that scrub fire out at Wandilo we had the siren on mix  :lol: and it was really wicked cause it was a big change from our old siren box which just had yelp and wail 

You werent scaring the cows were you?
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Offline SA Firey

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Re: Siren Types And Use
« Reply #9 on: October 18, 2006, 06:03:17 PM »
Quote from: Darius on October 18, 2006, 03:25:31 PM

jeeze you guys have obviously got the siren control somewhere you can reach it then!  On our 24 the on/off knob is on the lower dash but the one that varies the tone is behind the centre front seat (single cab) and you've got no hope of operating it while driving.


Dave you can get a relay board and retrofit to the siren so the driver can change the tone by hitting the horn button :-D

mattb will know the source for it as Morphett Vale did it to their 24 :wink:
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Offline mattb

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Re: Siren Types And Use
« Reply #10 on: October 18, 2006, 07:32:20 PM »
Yeah all of our appliances have the remote switching facility on the horn, works well and means that the driver is in full control.

Give those crazy lads at Emergency Safety Systems (ESS) a call, they should be able to sort you out.
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Offline Darius

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Re: Siren Types And Use
« Reply #11 on: October 19, 2006, 10:49:11 AM »

ta, will talk to the captain about it as he's keen on a few other small mods to improve usability of the appliance.
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Offline CFS_Firey

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Re: Siren Types And Use
« Reply #12 on: October 19, 2006, 02:22:53 PM »
Quote
Yeah, we have people that love to set the siren on mix and leave it there, but most other people who half a brain use yelp for intersections/blind corners on narrow roads, and wail for the rest.

How is leaving the siren on mix < half brained compared with people who change it from one to the other?  Wouldn't the < half brained people be the ones who change it all the time rather than setting and forgetting it? ;)
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Offline 2090

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Re: Siren Types And Use
« Reply #13 on: October 19, 2006, 03:13:07 PM »
Just suggesting that the sirens have multiple sounds for different uses, and it defeats the point of having the different sounds if people set it on one and leave it.
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Offline CFS_Firey

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Re: Siren Types And Use
« Reply #14 on: October 19, 2006, 03:26:46 PM »
Doesn't it defeat the purpose of changing the sounds if all the sounds are operating at once? (which is what mix does - wail and yelp together - hence not needing to change when approaching an intersection...)
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Offline 2090

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Re: Siren Types And Use
« Reply #15 on: October 19, 2006, 03:56:31 PM »
Isn't the point of yelp to create an obviously distracting and different sound around intersection to attract the attention of motorists? Thats atleast how most every other emergency service in South Australia and the world use their sirens. If you leave it on mix, then, yes, it does have both wail and yelp at the same time but there is nothing to change it to that is different. Plus Mix operates a highp itched tone which I find a bit quieter and harder to hear.
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Offline CFS_Firey

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Re: Siren Types And Use
« Reply #16 on: October 19, 2006, 04:04:49 PM »
Actually, the the distinction is more to do with sound waves, and how far they travel... Yelp travels shorter, but is better at getting attention (hence used at short range spots like intersections) and wail travels further, (hence why it is used on long straights)...
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Offline 2090

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Re: Siren Types And Use
« Reply #17 on: October 19, 2006, 04:54:36 PM »
Not quite, but if it makes noise and gets people out of the way, then at the end of the day its good.
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Offline medevac

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Re: Siren Types And Use
« Reply #18 on: October 19, 2006, 08:51:12 PM »
hmmm.... well i rekon mixing it up a bit is good...


you use wail... hit an intersection go to yelp, then back to wail....

>?

hitting yelp is meant to let the public know that your entering/approachign an intersection.
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Offline mack

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Re: Siren Types And Use
« Reply #19 on: October 19, 2006, 09:52:33 PM »
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Offline Mike

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Re: Siren Types And Use
« Reply #20 on: October 19, 2006, 10:39:50 PM »
Personally it drives me nuts to leave it on for an entire trip anyway....
using a single tone gets on the crews nerves after a while too.
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Offline RescueHazmat

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Re: Siren Types And Use
« Reply #21 on: October 19, 2006, 11:05:59 PM »
Hyperyelp/ Hyperlow and Air/Electronic Horn through intersections, vary between wail and yelp through traffic / longer periods without intersections...
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Offline Camo

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Re: Siren Types And Use
« Reply #22 on: October 23, 2006, 07:49:27 PM »
Quote from: RescueHazmat on October 19, 2006, 11:05:59 PM
Hyperyelp/ Hyperlow and Air/Electronic Horn through intersections, vary between wail and yelp through traffic / longer periods without intersections...

What truck is this on?

Would it be possible to get a sound file of it?
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Offline RescueHazmat

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Re: Siren Types And Use
« Reply #23 on: October 23, 2006, 09:42:12 PM »
Found the following for you...

http://www.fedsig.com/multimedia/sirens/index.php?id=108

HYPERYELP = 'Priority' tone

If you really want to move traffic, have a listen to the ' Scan ' tone also. - The electronic airhorns are a little dull, true airhorns break peoples concentration / tunnel vision when driving and really make the ears perk up.

&

http://www.fedsig.com/multimedia/sirens/index.php?id=195

For another version of hyperyelp - listen to  'Priority' tone on this link also..




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Offline TillerMan

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Re: Siren Types And Use
« Reply #24 on: October 26, 2006, 01:29:44 PM »
On older appliances with 2 speakers mix is a bit softer coz they put one tone through each speaker.
On newer trucks with 1 speaker mix is as loud as the other tones .

As of this year no new CFS appliances will have mix as it is not a recognised siren tone, they will all have the code 3 siren in the attached link.

http://www.code3pse.com/productdtl.asp?grp=cd3&familyid=4&id=170
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