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,
George A. Loud George A. Loud Colonel George Alvin Loud (June 18, 1852 – November 13, 1925) was a politician from the U.S. state of Michigan. Loud was born in Bainbridge Township, Geauga County, Ohio, and moved with his parents (Henry M. Loud and Vilitta Kile) to Massachusetts in 1856 and then to Au Sable, Michigan, in 1866. He attended the English High School in Boston, and Professor Patterson's School at Detroit, He graduated from Ann Arbor High School (now Pioneer High School) in 1869. He was vice president and general manager of the Au Sable and Northwestern Railroad. For four years he