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.
And today, there just isn't a good argument to declare one style of compound bow limb superior to the other. That reality was soon solidified when many of those same lecturing manufacturers crossed their own lines in the sand, and changed some, or all, of their bows to split from solid, or to solid from split.