Active noise control: Open problems and challenges

This paper introduces active noise control (ANC) techniques focusing on challenges in developing practical applications and open problems for research from the signal processing perspective. We propose advanced strategies to further improve ANC performance that include virtual sensing, residual noise masking, and active sound quality control. We also present several challenges for real-world applications such as canceling high-frequency and impulse-like noises, and reducing noises generated from moving sources. Finally, ANC applications in consumer products and healthcare devices are used to demonstrate some potential add-on functions for promoting cost-effective ANC products.