The electric guitar, invented in the 1930s, revolutionized music by amplifying sound through electronic pickups. These pickups convert string vibrations into electrical signals, allowing for a wide range of tones and effects. Key innovations include the humbucker pickup, which reduces noise, and the solid-body design, which minimizes feedback. Other significant inventions for electric guitars include the effects pedals, which modify sound with various effects like distortion and reverb, and the tremolo arm, allowing players to bend notes. The introduction of digital modeling amplifiers has further expanded the possibilities for sound manipulation, making electric guitars versatile instruments in modern music.