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.
The compound bow is a newer and more up-to-date bow with a plethora of features. The recurve bow is a traditional bow due to its shape and has been around for hundreds of years. They are simply a single bow body with a string. They are made today of fiberglass and carbon for durability and strength.