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,
Goal (ice hockey) the role of that sound is expanded to cover every goal scored, and that the horn only sounds once. The horns are different depending on the teams, some even have sound effects such as an alarm or the foghorn of a ship, or both combined, for the Washington Capitals and the Anaheim Ducks. Hockey fans have said that the loudest goal horn belongs to the Anaheim Ducks, who have a very loud fog horn with high bass, or the Philadelphia Flyers, who have a very loud ship’s signaling horn. Also, during the 2006 Stanley Cup playoffs, the Edmonton Oilers added