Vehicle horn of vehicle horns are used by percussionists as sound effects, or even melodically, in musical works. For example, George Gershwin's 1928 orchestral work "An American in Paris" calls for the use of 4 taxi horns. György Ligeti's opera "Le Grand Macabre" features two "Car Horn Preludes" scored for 12 bulb horns, each one tuned to a specific pitch. Klaxon is a trademark for a brand of electromechanical horn or alerting device. Mainly used on cars, trains and ships, Klaxon horns produce an easily identifiable sound, often transcribed onomatopoeiacally in English as "ahoooga." Like most mechanical horns, the klaxon has largely
Alarm clock Alarm clock An alarm clock (alarm for short) is a clock that is designed to alert an individual or group of individuals at specified time. The primary function of these clocks is to awaken people from their night's sleep or short naps; they are sometimes used for other reminders as well. Most use sound; some use light or vibration. Some have sensors to identify when a person is in a light stage of sleep, in order to avoid waking someone who is deeply asleep, which causes tiredness, even if the person has had adequate sleep. To stop the sound or