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 (Saves the Day album) Conley performed a few solo shows across the east coast. In March 2007, Parada left the group and was replaced by Classic Case/Glassjaw drummer Durijah Lang. In April and May, the band went a co-headlining tour with Say Anything. "Sound the Alarm" reached number 67 on the "Billboard" 200 chart and number four on the Independent Albums chart. According to review aggregator Metacritic, the album received generally favourable reviews. The music of "Sound the Alarm" divided reviewers, with some praising it, while others were unimpressed. AllMusic reviewer Corey Apar viewed the album as a return to the "aggressive pop-punk nature"