Mid-1920s a man named Charles Ditto produced a duck call called the Eureka Model. Through 1920-1930s several new duck calls were produced using different styles or techniques to produce different kinds of sounds. Olt's calls were mostly made of rubber and wood, but he did produce some acrylic models. Many hunters would modify it to change the sounds and eventually this led to the production of the вЂњcutdownвЂќ duck call. In 1950, Olt developed the Model D-2 Keyhole, which became incredibly popular. It was made of a strong hard rubber-plastic that allowed hunters to change the volume and tone of the call. Olt received a patent in 1905 for the first adjustable tone duck call. Most made today still use this same technique. He began his duck call company in 1904 with his Arkansas Style duck call which has a straight reed and curved tone board. Phillip Sanford Olt from Pekin, IL was one of the most widely distributed duck calls in the 1900s. ДЇrom 1900-1910 many modifications were made to duck calls such as the straight tone boards were replaced with curved ones, wedges were replaced with groove and cork locking systems, and there began to be production of duck calls made out of materials other than wood such as rubber and acrylic. Glodo Jr.'s most well-known production is the Reelfoot Lake Style duck call. began producing duck calls, he is credited with the barrel shape, his signature copper reeds and using the вЂњduck wingвЂќ checkered pattern. In the early 1890s a blacksmith by the name of Victor Glodo Jr. This call had a screw that retracted from inside the barrel which changed the sounds that were produced. David Fuller was the first to receive the patent for the goose call in 1885 and impacted the duck hunting world in 1903 with his combination goose/duck call. Fred Allen was the first to sell his duck calls commercially and began advertisements in 1880. Tongue Pinchers had limited tone range and often cut the hunters' tongues and mouths. Fisher was famous for the production of his Tongue Pincher Duck Calls which were made of two pieces of curved wood facing each other with a metal reed sandwiched between them and a holding device (usually a band) holding it all together. His most unusual call was the вЂњAllen Nickel-Plated Duck CallerвЂќ which was made of metal but froze to the hunters' lips and had to be re-made using wood. Allen's calls were barrel calls with straight tone boards and curved reeds. In 1863, Fred Allen had created external duck calls, but did not have a patent. Non-patent duck calls may have been made as early as 1850, but the first patent was awarded to Elam Fisher in 1870. Hunters would feed wild tame ducks and trap them, using their calls to attract wildfowl. This dates back to 1678, but it is believed that the use of call ducks originated in the Far East. However, decorative duck calls can be quite elaborate and expensive.Д«efore the mass production and popularization of duck calls, hunters used their own voices (mouth calling) or used call ducks or duck decoys. It is still the preferred call, as it is more time-consuming to manufacture and design. Wood expands and contracts with the changing temperature and humidity levels.

Another key difference is that acrylic is known to show less sound variance over the temperature ranges expected in a duck blind. When hunting in timber or swampy area, a wood call is preferable. Most acrylic calls have the capability of getting much louder than double reed calls. Acrylic calls are preferred in large open spaces for a call to reach out and find the ducks.

Different waterfowl hunters have varying opinions on what the best type of duck call is and when it is most effective. This is important for different types of duck hunting. The key difference between wood and acrylic duck calls is that acrylic calls are much louder and carry much further than wood duck calls. The two most common high quality duck call materials are wood and acrylic. There are many other variations and techniques to make effective sounds with a duck call. The more experienced callers simply push the air from their diaphragms with no words to be spoken into the call. With the improvement of calls and calling techniques the more experienced callers do not use their voice to perform their techniques. In order for a hunter to make the feeding call, the hunter must say a quick repetition of 'tiki-tika' or 'duga-duga'. Hunters would use the air from their diaphragms into the call while saying 'hut', 'wuit', or 'oak' to make the single quack. The insert is the end in which the sound is produced. Early duck calls were simple woodwind instruments with a barrel, a sound board and ak that is used to hold the reed into place on the sound board, make up what is known as the insert. As a tool, a duck call is like a traditional whistle made to emulate the sound of a duck.

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