A countertenor is a type of classical male singing voice whose vocal range is equivalent to that of the female contralto or mezzo-soprano voice types.
Types of Compound Bows. Compound bows are classified by the type of cam system they use (called the bow eccentric.) The most popular types of compound bows on the market are Single Cam (sometimes also called One Cam or Solocam), Hybrid Cam, Dual Cam and Binary Cam. Less common designs like Quad Cam and Hinged are a little harder to find.
Different types of archery need different styles of bows. Each type or style of archery has a particular type of bow that archers shoot in a specific division. Most archery competitions welcome other bow styles by using separate divisions. To give you a better idea of the different types of bows and the shooting styles they participate in, the following chart should help you in narrowing down the right equipment selection.