Abstract: Film-type acoustic metamaterials have great application potential in the field of acoustics. In this study, dielectric actuated acoustic absorber is designed for active sound absorption and noise reduction based on thermoplastic polyurethane (TPU) dielectric elastomer films. Active sound absorption is realized by means of PID control of the dielectric actuated acoustic absorber. Theoretical formulas for the sound absorption coefficient of the dielectric actuated acoustic absorber before and after PID control are derived via theoretical model. Simulation analysis is carried out to investigate the control law of PID on the sound absorption performance of the dielectric actuated acoustic absorber. A genetic algorithm is used for optimal control at target frequencies. The results show that the absorption coefficient at the target frequency nearly reaches 1 after optimization. Finally, active control experiments are performed on the proposed dielectric actuated acoustic absorber to verify its effectiveness and engineering application potential for low-frequency noise control.