> > Why is that - my car has dual-tone horn fitted as standard, although
> > > obviously not air horns. I don't see why dual-tone is illegal for air
> > > horns though - it does give a more noticeable sound than a single-tone > > > horn.
> >
> > You can have dual, triple, or a hundred tone air or any other type of
> > horns, provided they all play at once, not in sequence.
> >
> Cheers guys, that's cleared it up :-).
amazing