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,
Poppa's Got a Brand New Badge the episode was also pitched by Gould, who had just moved to southern California with his wife. After moving in, the two decided to install an alarm system because, Gould quipped, "the police aren't enough. Too many people wanna kill you." When meeting the other writers, Gould pitched an episode in which Homer becomes the owner of a security company, which then became "Poppa's Got a Brand New Badge." Although current showrunner Al Jean found it "very funny," the episode's first draft was heavily altered after the first table-read, a process in which the script is read out loud to