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,
Sound the Alarm (Howie Day album) featuring the album tracks "Be There", "40 Hours" and "Counting on Me". The EP was released to iTunes on May 5, 2009. Sound the Alarm (Howie Day album) Sound the Alarm is the third full-length album by American singer-songwriter Howie Day, and the follow-up to his million-selling second album "Stop All the World Now". It was recorded over a three-year period, during which he attended a rehabilitation center for alcohol abuse. The album was originally set for release in 2008 before being delayed and eventually released by Epic Records on September 8, 2009. In late 2008, Day uploaded the song