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1 The bridge holds the ends of the strings in place. 2  The guitar body amplifies the sound and sends it out through the sound hole. 3  The pick guard protects the guitar body from getting scratched by a pick. 4  The frets are the metal ridges embedded in the guitar neck.
Acoustic guitar. An acoustic guitar is a guitar that produces sound acousticallyâby transmitting the vibration of the strings to the airâas opposed to relying on electronic amplification (see electric guitar). The sound waves from the strings of an acoustic guitar resonate through the guitar's body, creating sound. This typically involves the use of a sound board and a sound box to strengthen the vibrations of the strings. The main source of sound in an acoustic guitar is the string, which is plucked or strummed with the finger or with a pick.