exciter

Noun

 * 1) A person who excites.
 * 2) The electronic oscillator that generates the carrier signal for a transmitter.
 * 3) An audio signal processing technique used to enhance a signal by dynamic equalization, phase manipulation, harmonic synthesis of (usually) high frequency signals, and through the addition of subtle harmonic distortion.

Verb

 * 1) to excite (to stir the emotions of)