<human>: What is the difference between an acoustic guitar and a regular guitar?
<bot>: The main difference between an acoustic guitar and a regular guitar is that an acoustic guitar produces sound by vibrating strings, while a regular guitar produces sound by transferring energy from the strings to the body of the instrument. An acoustic guitar typically has a hollow body, which allows for more resonance and sustain, whereas a regular guitar's body is solid. Additionally, acoustic guitars are usually strung with nylon or gut strings, while regular guitars may be strung with steel, phosphor bronze, or nylon-wound strings.