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,
Concertino for Horn and Orchestra (Weber) Concertino for Horn and Orchestra (Weber) The Concertino for Horn and Orchestra in E minor, J188 (Op. 45), was composed in 1815 by Carl Maria von Weber. It is an extremely taxing work, whether played on the natural horn for which it was written, or on the modern valve horn. The soloist is accompanied by a small orchestra. It requires, among other feats, that the player produce what is in effect a four-note chord using the interplay between humming and the sound from the instrument, a technique known as multiphonics. The work is widely recorded and performed, appearing in the