Electroacoustic, semiacoustic and hollow body are terms used interchangeably for electric guitar. Acoustic guitars are composed of pickups, while electroacoustic guitars will not belong to the area of semi-acoustic or hollow electronic guitars. Electroacoustics and electroacoustics are considered electric guitars designed with piezoelectric transducers, electromagnetic pickups or condenser microphones. . These two guitars are completely unique. The semi-acoustic guitar consists of solid blocks inside.