Vehicle horn England, developed a standard electric car horn in 1910. Car horns are usually electric, driven by a flat circular steel diaphragm that has an electromagnet acting on it in one direction and a spring pulling in the opposite direction. The diaphragm is attached to contact points that repeatedly interrupt the current to that electromagnet causing the diaphragm to spring back the other way, which complete the circuit again. This arrangement opens and closes the circuit hundreds of times per second which creates a loud noise like a buzzer or electric bell, which sound enters a horn to be amplified. There
Sound the Alarm (Saves the Day album) Carrero was a member of the group, and on January 30, that they had re-signed with independent label Vagrant Records. The label had previously released the band's "Stay What You Are" (2001) and "" (2004) albums. Label boss Rich Egan stated that the band "helped put Vagrant on the map" and that the label was "ecstatic to have them back". On February 13, the track listing and artwork for "Sound the Alarm", which was designed by Soloway, was revealed. In March and April, the band toured the US with support from Circa Survive and Moneen. On March 23, "The End"