The guitar has been around in one form or another for centuries, and the principals behind how it works have been in use forever. The term "acoustic guitar" is a retronym, because all guitars were acoustic. It was not until the invention of the electric guitar that a distinction became necessary. Acoustic refers to a hollow-bodied guitar without electric amplification. Six strings composed of either nylon or steel produce corresponding frequencies of open notes E, A, D, G, B, and E. The top plates of more expensive guitars are made of spruce or cedar, and the back and sides are often made from Brazilian rosewood, maple, or mahogany because these woods are very hard and contribute to a brighter sound. Lower priced guitars typically combine solid tops with laminated backs and sides, and entry level guitars are made entirely of laminated wood. A round hole in the top plate contributes to the sound it produced, and the strings of the guitar control the pitch and harmonic content of the tone.

Various combinations of different woods and their quality contribute greatly to the tone of the acoustic guitar, as do design and construction elements. A well made guitar's tone improves over time, and reflects the quality of craftsmanship used in making the instrument. If you’re considering building your own guitar from a kit, you can find it on www.acousticguitar.com; it may be easier than you think. Acoustic Guitar Central is where to find guitar sheet music and the latest from Acoustic Guitar magazine, featuring articles, guitar lessons, guitars and gear, resources for beginners, teachers, discussion forums, video demonstration gallery, subscription services, and even a free newsletter.

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