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,
Cause for Alarm (album) Cause for Alarm (album) Cause for Alarm is the second full-length studio album by New York hardcore band Agnostic Front. It was released in 1986 on Relativity/Combat Records and follows 1984's "Victim in Pain". The album is still available on a split release with "Victim in Pain" on the same disc. The addition of a second guitarist – Alex Kinon – led to a more metallic approach, although the songs still had mostly a hardcore sound. One other line-up change was the replacement of Dave Jones by Louie Beatto on drums. The band would further explore the metal sound on