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 Calix, Rashad Becker and Tyondai Braxton. Alarm Will Sound first presented "Ligeti", a concert in radio play format. Alarm Will Sound's production tells György Ligeti's story through a blend of music, text and imagery. Centered on his Chamber Concerto and Piano Concerto, the performance makes connections between biography and music, explores the relationship of politics and art, and sheds light on his unique artistic imagination. Members of the ensemble began playing together while studying at the Eastman School of Music in Rochester, New York, and have diverse experience in composition, improvisation, jazz, popular styles, early music, and so-called world music.