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 layer, creating exhilaratingly complex instrumental textures, which Alarm Will Sound realise with great panache." Alarm Will Sound began their "St. Louis Season" in 2013 to complement their existing touring schedule and bring to the midwest the work they do around the country and abroad. The goal being to grow a local audience for contemporary performing arts. In St. Louis, AWS has presented concerts at The Sheldon Concert Hall, the Touhill Performing Arts Center and The Pageant. In the 2013-2014 season, Alarm Will Sound partnered with The Metropolitan Museum of Art and became artists-in-residence at the institution. Their season at the