e-bow

The EBow or ebow is a brand name of Heet Sound Products, of Los Angeles, California, for the original type of handheld string resonator, invented by Greg Heet in 1969, first marketed in 1976, and patented in 1978. The name Ebow stands for "Electronic Bow" or Energy Bow) (often spelled E-bow in common usage). The EBow is a battery-powered electronic device for playing the electric guitar. The resonator uses a pickup - inductive string driver - feedback circuit, including a sensor coil, driver coil, and amplifier, to induce forced string resonance. The Ebow brand resonator is monophonic, and drives only one string at a time, producing a sound reminiscent of using a bow on the strings.