How loud can you legally have a car horn?
 

Just wondered having seen this video: where a guy has a ferry horn fitted what legalities would be of doing something or anything similar on a loud theme on car horns in UK?
Ta
Si

Quality:D :notworthy

I'm not sure about the legalities of having one that loud, but I understand that as long as the original horn is still in place and working, it's legal to have air horns and the like:) Handy that, since I have some which I'm just persuading to work at the moment. Made by Maserati, and with 3 notes. Someone gave them to me:)

:cry: that is so funny. Thinking of standing on the deck of cross channel ferries I can only imagine how loud it must be. Must be a beast of a size tho :D

yeah i was thinking of leaving the normal horn there for standard uses but having a silly big one for special occasions ;) pmsl
There must be some legal limit thou before it's classed as polution or assault or sum such BS surely?
Si

All I can find is that a car horn is usually 100-110 dB. No idea on max. Should be in the construction and use regs I'd think, I'll have a rummage.

cheers, sure half the jap horns are more a timid noddy sounding 20 db ;)
Si

Still can't find much, but there is some issue relating to the sound limit for an Alarm, which seems to fall in to the aforementioned range. My guess would be that due to many alarms making use of the car horn, this then limits the volume of the horn. However, if you were to have separate / additional horns, I have no idea what the arrangement would be.

"Causing a danger to other road users" like perforating their eardrums...

Are they the proper 60's ones that sound like a baboon having it's nuts grabbed?

We often fit train horns to trucks at my work which are fookin loud, especially when you're walking throught the pitch black yard and one of the lads decides to give you a blast as you walk past :mad: (new pants needed)

I have one of the 20db horns fitted as standard to my subaru, its all very gay i try not to use it

A friend of mine has got a train horn is is trying to fit to his car!!!!

I'd heard of that being done as a one-off. Why do you say "often"? Sounds like a common and perhaps legal mod? Which suggests that either the original truck horns were crap (like scoobs), and/or that it's no big deal?

Need air compressors, don't they? So fitting one to a car would be a pig...

Some guy's who we used to go rallying with had a pair of train horns on their VW LT35 service barge:D, They used to drain a fairly hefty air reservoir with a couple of good blasts:D:D

Running a compressor on a car is not that difficult, you can use a modified A/C compressor, the biggest PITA is siting a decent reservoir:)

PS On the same subject, does anyone know where I can get a proper 12V klaxon from?

ooh cheers - this could come in useful on Portuguese roads :D

We deal with a customer who has a fleet of lorries, he gets us to fit these to each of his units. Maybe i should have said occasionally ;)

was guna say presuming i have plenty of space in a sizable car what do i need to do big ass train or similar horns properly?
Si

SIAL BTW ;)

They are train horns
http://www.hornblasters.com/products/category.php?id=1

And more vids here
http://www.hornblasters.com/vide.php

yeah but i wasn't doing it as a woohoo look wot vid i have i was doing it as an enquiry on legalities of doing it which was nicely demonstrated by the extreme nature of those vids https://www.clicksmilies.com/s0105/l...smiley-008.gif lol
Si

Construction and Use Regulations, Part II, Section F, States under the guidelines for Audible Warning Instruments that the tone of a horn must be..."continuous, uniform and not strident"...typically ambiguous, although the dictionary clarifies "strident" as "harsh of tone, grating or jarring"
I guess that a ferry horn would be fairly "jarring" :eek: so they could have you under Construction and Use Regs!