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,
Horn (video game) those looking for a mobile game that can live up to its console contemporaries, Horn is a must-have. " Appspy said " Horn brings a rich fantasy world to life, combining elements of classic and modern adventure titles to create something all its own; an incredibly engaging title and a definite must have. " Gamezebo wrote " I don't want to sound too overdramatic, but if I were looking to sum up Horn in two words, it would probably sound something like 'mobile masterpiece.' " SlideToPlay said " Horn is an enormous, beautiful, carefully-constructed game that shows off what iOS