The Achaemenid sorna was a large trumpet-like instrument, but in later dates was reduced in size, and became more like (shrill oboe), or "dozale" (double oboe), which is characterized by a turned wood body of simple shape, with a heavily flared bell. The earlier was categorized as a trumpet, but this was a mistaken idea based on the bell of the oboe and the freeblowing embouchure that often gives a superficial resemblance to a brass embouchure, particularly if the oboe is fitted as so many are with a lip ring.