Is it true that emergency vehicles have different sirens?

fideux

The sound produced by a siren is determined by the company that makes it. The difference is that some places put one company's sirens on their vehicle, and others get theirs from someone else.

There is no set pattern for emergency vehicles of any specific type.

des c

It depends in what country you are in or in what county in the UK. Most emergency services use the electron siren, I first heard this on Hawaii 5- 0 years ago. The UK still have the trumpet air two tone horns. These horns are must better than the electron wailers. How many times have you been stationary at traffic lights trying to work out from which direction the sirens are coming from. Some fire services use the wailers in connection with air "Bull Horns", ie like the big lorry horns. In the states you can always identify a fire engine with its "Rolling Siren" in operation.
But it was once said, you could have all of Blackpool Illuminations flashing and the London Philharmonic Orchestra playing, Joe public would still not hear or see you approaching and get out of the way.

ANDY S

Yes. Each vehicle has it's own sirens fitted, which is why they all have different ones. OK?

Bardic

Not specifically to the type of vehicle, it depends on what the fleet manager fancies really.
Nearly all have the electronic sirens, which have options of wail, yelp or two-tone and some switch sequentially between the sounds.
They've also realised that the human ear has great difficulty working out what direction one of these is coming from, so in some cases they've added either a "white noise" generator or a peculiar grunt, which we CAN pinpoint.

The original Peter G

Yes they probably do, but when you hear one your first thought should be to get out of the B***** way, not thinking what sort it is!

Tequila

Just slightly different tones.

Twisted_Ace

The main types of siren are officially known as wail, yelp, whoop and two-tone.

Ambulances also have 'junction horns', which sound like a freight train. Their use is pretty clear...

Additionally, many emergency vehicles have a white noise generator. This produces a loud hissing (white noise) which is easier for the human ear to locate than a siren.

Yes they do have different sounding sirens. This is really noticeable in cities and towns.

bullbusbutt

yes they do they all used to go ne nar ne nar now they have funky sounds fire engines have air horns trhat nearly make me stand in poo fire engines are also the loudest they all have brand new light bars too

Mumofthree

Yes they do but I still don't know the difference between them.

tatted up

yes they do... cop cars ambulances...etc. all have diff sirens

Hibeeechick

yes they all have distinctly different tones

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