Acoustic principle of electric guitar

The electric guitar is a plucked string instrument. The inventor is George Beecham and Adolf Rickenbacker.
Different from the traditional guitar, the principle of vocalization is not the vibration of the box, but the principle of electromagnetics. Its body is a solid wood, not an empty sound box. A coil is fitted to the body of the harp. They are called a pickup. When the magnetized guitar strings vibrate, the flux of the coils on the pickup is changed to produce a current of different frequencies in the coil, and when the electric current is reduced through the electronic sound box, it becomes the sound of the electric guitar.