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.
Determine the length of the bowstring. For a recurve bow, the string should be 3 1/2 inches shorter than the full length of your bow. The string length for a compound bow should be listed in the literature from the manufacturer, or it may be found written on one of the bow limbs. Calculate the number of strands in the string.