Active Noise Control Simulations using the Transmission Line Matrix Method

Abstract

Active noise control (ANC) focuses on removing unwanted sounds or vibrations in an environment with the use of sensors, actuators and a mathematical algorithm. New algorithms are typically evaluated in simulation prior to implementation. Despite the popularity of this research field, simulations tools are limited, and most verifications are performed using scripts that often simplify the propagation environment. This can lead to a strong mismatch between simulation and measurement results. The transmission line matrix method (TLM2) is a wave propagation algorithm that has previously found success in indoor wireless planning due to its ability to easily model complex environments. This thesis proposes an ANC simulator using the TLM2. Extensive capabilities of the simulator are demonstrated with generic wave propagation scenarios and two ANC algorithms. The simulator is implemented on the GPU to improve execution speed. The simulator is interfaced with MATLAB to enhance testability of new algorithms.