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
Alarm Will Sound Alarm Will Sound Alarm Will Sound is a 20-member chamber orchestra that focuses on recordings and performances of contemporary classical music. Its performances have been described as "equal parts exuberance, nonchalance, and virtuosity" by the "Financial Times" and as "a triumph of ensemble playing" by the "San Francisco Chronicle". "The New York Times" said that Alarm Will Sound is "one of the most vital and original ensembles on the American music scene." Alarm Will Sound's repertoire ranges from European to American works, from the arch-modernist to the pop-influenced. The group has worked with contemporary composers, premiering pieces by Steve Reich,