The guitar is a musical instrument classified as a string instrument with usually having six strings. Guitars are classified into Electric and Acoustic Guitar. We can find three main types of modern acoustic guitar: the classical guitar (nylon-string guitar), the steel-string acoustic guitar, and the archtop guitar, which is sometimes called a “jazz”. Guitar sound have some effect in humans. It is said to be that they Wave Away Stress, Feel Serious Pleasure, Send Pain Packing, Sharpen Your Mind, Toughen Your Ticker (significant drop in blood pressure and a lower heart rate) and Build More Brainpower. Its always feel relaxed.