A horn (also called a horn) is intended to give off a danger signal at, among others, cars and trucks. The first horns were used on American cars in 1908. Shortly afterwards they also came to the Netherlands.
A horn often produces a monotonous sound, but there are also multitones in use. Multi-tone horns are prohibited in the Netherlands. The horn should emit a steady tone. When 2 horns are mounted next to each other, each giving a different sound level (one for the treble and one for the bass), these horns should switch on and off at exactly the same time, so that it seems as if it still has 1 tone. is.