Class 185 american?

[Class 153]

Hi im new here

And i would like to start my first thread about the class 185s horn.

I usally see class 185s in my area and sometimes they are british 2 tones but sometimes the horn sounds american.

Are their horns from america?

 

[GNERman]

don't think so, sounds very british to me...

 

[ainsworth74]

I think what you're hearing is just the driver using one tone rather than both because the horn is definitely a British two tone. This is due I think to a rule change over the use of horns but the exact details of which I'm not sure about.

 

[T163R]

Does anyone know a video of a horning 185 ?

 

[YorkshireBear]

http://www.youtube.com/watch?v=sqxObA-Sngc simple search on youtube

 

[ainsworth74]

No but I would suggest a quick search on youtube with the terms "class 185 horn" will probably give you some good results.

Edit: Ah it appears Jimmy has been kinder than me

 

[T163R]

Thanks guys

 

[YorkshireBear]

No but I would suggest a quick search on youtube with the terms "class 185 horn" will probably give you some good results.

Edit: Ah it appears Jimmy has been kinder than me

i did 'class 185 tone' though

 

[T163R]

The horn sounds british, but it has a small american feeling (not loud enough to be one, though)

 

[Via Bank]

Voyagers can be made to sound American.

 

[Philip]

Some 185s - I think the older ones around the 10x's and 11x's, have a different 2 tone similar to the type found on Pendolinos and Coradia units, whereas the others are more Voyager like. 185110 and 185112 are two that I know sound like the former, plus a few others in that range.

Also the outside horn noise sounds quite different and louder than what you hear inside!

 

[Class 153]

Does anyone know why and where they got american horns from?

 

[Philip]

Here we go, 185112 and its 'Pendolino' or 175/180 style horn: http://www.youtube.com/watch?v=aEtwO8bDS1c

This one on the other hand sounds different - http://www.youtube.com/watch?v=cw6wmQjX6wI

 

[kentuckytony]

Freight trains that pass level crossings over the hill from my house use a 4-part deeper (melancholy) tone accroding the the rules here: [- = short, o = long]
Rule 14(l): – – o – 1. Trains or engines approaching public highway grade crossings shall sound the horn at least 15 seconds, but no more than 20 seconds before the lead engine enters the crossing. Trains or engines travelling at speeds greater than 45 mph shall begin sounding the horn at or about, but not more than, one-quarter mile (1,320 feet) in advance of the nearest public crossing. Even if the advance warning provided by the horn will be less than 15 seconds in duration. This signal is to be prolonged or repeated until the engine or train occupies the crossing; or, where multiple crossing are involved, until the last crossing is occupied. 2. Approaching tunnels, yards, or other points where railroad workers may be at work. 3. Passing standing trains.

Here's a whole site-load of American deisel horn sounds: http://www.dieselairhorns.com/sounds.html

 

[umontu]

Those sounds are similar, remember when an object moves ie a police car with its siren on, it is subject to red shift or blue shift (I know there is another term for it but I can't remember it).

For example, when the car moves towards you the sound waves produced are closer together, meaning a high frequency (red shift, higher pitch)

As the object passes the frequency slows, (creating blue shift, lower pitch)

Therefore with the videos it is possible to determine that the Leyland train is moving faster than the other train because the pitch is slightly, albeit not by much, higher.

Just out of interest what happens if a driver fails to use their horn at a sign? I was on a tpe 185 recently and sat just behind the driver's cab, heard the horn go several times then I saw the 'W' board and heard nothing. (Won't reveal locations/times for obvious reasons.)

 

[Via Bank]

Those sounds are similar, remember when an object moves ie a police car with its siren on, it is subject to red shift or blue shift (I know there is another term for it but I can't remember it).

For example, when the car moves towards you the sound waves produced are closer together, meaning a high frequency (red shift, higher pitch)

As the object passes the frequency slows, (creating blue shift, lower pitch)

Almost.

It's called the Doppler effect, and it's a result of the change of wavelength resulting from the motion of the source. It's only called red/blue shift when it involves light or other electromagnetic radiation, and the reason it occurs there is because of the expansion of space causing the waves to become "stretched."

Anyway, I suspect the reason that our two-tone horns sometimes sound American is either due to a change in the horn's acoustics, or (somehow) playing both tones at once to create the sort of harmonic noise that American horns make.

 

[umontu]

It's called the Doppler effect, and it's a result of the change of wavelength resulting from the motion of the source. It's only called red/blue shift when it involves light or other electromagnetic radiation, and the reason it occurs there is because of the expansion of space causing the waves to become "stretched."

Ah of course... :roll:

Thanks, did think of explaining the electromagnetic radiation side but thought it was way too off topic.


And I'm an Electro Acoustic Musician... (Hangs head in shame)

 

[185]

The horn is in a 3 stage-cascade setup.

At lower speeds, both tones are quieter, at full speed it is much louder.

No fun anymore when you want to scare someone walking past the cab whilst stationary

 

[ainsworth74]

No fun anymore when you want to scare someone walking past the cab whilst stationary

Not that you would ever consider doing something like that to an unsuspecting passenger I'm sure

 

[Class 153]

Hi im new here

And i would like to start my first thread about the class 185s horn.

I usally see class 185s in my area and sometimes they are british 2 tones but sometimes the horn sounds american.

Are their horns from america?

This is an example http://www.youtube.com/watch?v=Ea6XW3UucyM&feature=related