Sound signalling Hooter

A sound signalling hooter is an apparatus emitting a sound mainly intended to give a signal or to prevent of a danger. The sound signalling hooters equip mainly the automobile, trains and boats.

Sound signalling hooter or Horn?

By abuse language, a sound signalling hooter is commonly called “Klaxon”. However it is about a Antonomase: indeed, the Klaxon term is proper name (from where the capital letter) from which the origin is resulting from the company having produced the first sound signalling hooters for cars starting from 1908.

The company Klaxon Signals Ltd was repurchased in the Nineties by the company Fiamm (of Italian nationality). Today, the Klaxon company produces nothing any more but fire protection sirens. Official site of Horn.

Raymond Queneau proposed the orthography claqueson (Zazie in the subway).

Here the list of the other objects whose mark is used as name: Marks used as names .

Sound signalling type of hooter

electromagnetic Warning signal.
electromagnetic Warning signal with disc.
electronic Warning signal.
pneumatic Warning signals (with air): most famous is the siren , invented by Cagniard de Latour (1777-1859). It is about a system of Alerte to the populations functioning thanks to air " haché" using an air compressor. The horns offer a simpler type of pneumatic warning signals. The shape of these sound signalling hooters strongly resembles a trumpet. There is possibility of playing a simple melody if there exists a series of several horns alternated on the vehicle (5 or 6 horns of different sizes are enough).
emergency Warning signals (called sirens by antonomasia of the original invention of Cagniard of the Tower): they are the sound signalling hooters for emergency vehicle (ambulance, fireman, police force…). For more information on this type of sound signalling hooter, to see the article special Warning signal of vehicle.

Operation

The operation of the sound signalling hooters differ according to their type (electromagnetic, with air…).

the electromagnetic warning signals use a electromagnet with Rupteur to make vibrate a Membrane, which transmits its vibration to the ambient air.
the electronic warning signals, identical to the electromagnetic warning signals, consist of an electronic chart (fixed on the warning signal) made up of a Microcontrôleur generating a signal PWM, thus making it possible to simulate the mechanical action of the interrupter.
mechanical Siren of alarm: the siren of Cagniard de Latour functions thanks to a Compresseur with air. This compressor is a blade rotor enchased in a bored case of small regularly spaced openings. The rotor can be mû with the hand thanks to a crank and possibly a reducing pinion, or even motorized.
Warning signals tire: in the horns, (in the past a pear, currently a compressor) expels the air on the edge of a metal blade which is put in vibration, the air arises by a Pavillon from where the shape of trumpet.

Use of the sound signalling hooters on the road

The Klaxon is usually used to give warnings to the other road users. However, the Horn is also regarded as the source of noise pollutions. In the Highway code French, the use of the Horn thus is very regulated. In Agglomeration, it is prohibited except in the event of immediate danger. The night, the use of the Horn is authorized only in the event of absolute need. Lastly, the use of sirens or horns with multiple sounds is prohibited.

Any infringement with these rules can involve the immobilization of the vehicle and an infringment of second class.

In other countries, noise pollutions related to the use of the Horn can lead the authorities to impose more or less flexible restrictions. With Shanghai for example, since June 2007, any use of the Horn is strictly prohibited.

See too

Random links: