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,
A Loud Call A Loud Call A Loud Call is the third studio album by Australian indie-folk artist Holly Throsby. It was released on 14 July 2008, which peaked at No. 34 on the ARIA Albums Chart. Throsby worked with Nashville-based producer, Mark Nevers (Lambchop, Andrew Bird). At the ARIA Music Awards of 2008 she was nominated for Best Female Artist for the album. Most of "A Loud Call", the third studio album by Australian indie folk singer-songwriter, Holly Throsby, was recorded at Beech House Studios, the residence of producer Mark Nevers, in South Nashville, United States. Nevers had previously produced material for