A duck call may be either the sound-imitation process used in waterfowl hunting, by which a hunter lures waterfowl, or the actual tool which the person uses to do so. Early duck call tools were basic woodwind instruments, while later innovations are constructed of rubber and plastic, and allow the hunter to adjust the volume and tone of the calls with reeds. Today's duck calls usually fall into three main categories: single, double, or triple reed call with many variations, although the triple reed is rare. The goal of a duck call is to sound like a realistic live duck, in attempts to decoy, or fool a duck into believing the decoys that are seen by a duck, and the sound that is heard appears lifelike. Construction As a tool, a duck call is like a traditional whistle made to emulate the sound of a duck. Early duck calls were simple woodwind instruments with a barrel, a sound board and a cork that is used to hold the reed into place on the sound board, make up what is known as the insert. The insert is the end in which the sound is produced. Hunters would use the air from their diaphragms into the call while saying "hut", "wuit", or "oak" to make the single quack. In order for a hunter to make the feeding call, the hunter must say a quick repetition of "tiki-tika" or "duga-duga". With the improvement of calls and calling techniques the more experienced callers do not use their voice to perform their techniques. The more experienced callers simply push the air from their diaphragms with no words to be spoken into the call. There are many other variations and techniques to make effective sounds with a duck call. The two most common high quality duck call materials are wood and acrylic. The key difference between wood and acrylic duck calls is that acrylic calls are much louder and carry much further than wood duck calls. This is important for different types of duck hunting. Different waterfowl hunters have varying opinions on what the best type of duck call is and when it is most effective. It boils down to personal opinion. Acrylic calls are preferred in large open spaces for a call to reach out and find the ducks. Most acrylic calls have the capability of getting much louder than double reed calls. When hunting