A trumpet is a musical instrument. It has the highest register in the brass family. As a signaling device in battle or hunting, trumpets have a very long history, dating back to at least 1500 BC; they have been used as musical instruments since the 15th century. Trumpets are used in art music styles, where they are an instrument in the orchestra and in concert bands, and in popular music styles such as jazz. They are played by blowing air through almost-closed lips, producing a "buzzing" sound that starts a standing wave vibration in the air column inside the instrument. Since the late 15th century they have primarily been constructed of brass tubing, usually bent twice into a rounded oblong shape.