Vehicle horn horn. Bicycles often have a classic "bulb horn", operated by squeezing a rubber bulb attached to a metal horn. Squeezing the bulb forces air through a steel reed located in the throat of the horn, making it vibrate, producing a single note. The flaring horn matches the acoustic impedance of the reed to the open air, radiating the sound waves efficiently, making the sound louder. Other types of horns used on bicycles include battery-operated horns (sometimes even car horns on 12-volt circuits are incorporated) and small air horns powered by a small can of compressed gas. Oliver Lucas of Birmingham,
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.