Fire Engines Photos

Hi I saw this tl today on blues but I have heard the siren it was sounding on any type of uk emergancy vehicle anyone any idea thanks colin

Added by Colin richards on 21 March 2012.

has three 'tones'. one is the woop, the other is whelp and the third is standard two-tone

Added by Stevie Murray on 23 March 2012.

Should that not be yelp wail and two tone? Or has this got silly tones?

Added by Davey G on 24 March 2012.

Thanks guys but what I heard or the best way I can describe what I heard was more like a amplified clip clop in fact I would never thought it was any type of emergancy vehicle until it passed the bus I was on. Strange but true thanks guys

Added by Colin richards on 31 March 2012.

Take it that the clip clop is a "Localiser" as they were originally known. A white noise sound designed not to bounce off buildings. Only really works where the Siren points. Strange but effective at close quarters, kind of defeats the object of pre warning!

Added by Gary Simpson on 31 March 2012.

Thanks for the info. Is this type of siren on trial ? Thanks

Added by Colin richards on 01 April 2012.

If it is a Localiser it was developed 10 years or so ago by a Lancashire uni, A lot had them on trial, especially police. Was developed to avoid the "bounce" and echo off buildings. Very effective in certain circumstances but not recognised by Joe Public as a emergency tone really.

Added by Gary Simpson on 01 April 2012.

If I remember correctly Blackwall had them for an episode or two.

Added by Neal Glover on 01 April 2012.

And as you said in yours of the 31st, Gary, only worked where the siren pointed. This obviously meant that they were no use for warning traffic at intersections, etc. One wonders how much was spent on the development of these things !

Added by Ian Moore on 02 April 2012.

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