Vehicle horn England, developed a standard electric car horn in 1910. Car horns are usually electric, driven by a flat circular steel diaphragm that has an electromagnet acting on it in one direction and a spring pulling in the opposite direction. The diaphragm is attached to contact points that repeatedly interrupt the current to that electromagnet causing the diaphragm to spring back the other way, which complete the circuit again. This arrangement opens and closes the circuit hundreds of times per second which creates a loud noise like a buzzer or electric bell, which sound enters a horn to be amplified. There
What a Horrible Night to Have a Curse What a Horrible Night to Have a Curse What a Horrible Night to Have a Curse is a demo album by the American metal band The Black Dahlia Murder, released independently in May 2001. It is the band's only record to feature Sean Gauvreau on bass. Although The Black Dahlia Murder are considered a melodic death metal band, the style of the demo has also been described as metalcore. Vocalist Trevor Strnad said in a interview that much of the material on the demo is a blatant "rip-off" of the metalcore band Prayer for Cleansing. Its title is derived from