In the conventional active noise control (ANC), an error microphone array is necessary inside the region to measure the channels from the secondary loudspeakers to the error microphones, and record the residual sound fields during the noise control. These error microphone arrays highly limit the implementation of spatial ANC systems due to their impractical geometry and obstruction to the users from accessing the quiet regions. In this paper, we propose a method to estimate the secondary channels without using an error microphone array. Instead, a moving higher order microphone, such as an Eigenmike, is applied to obtain the impulse responses within the desired frequency bins from the secondary loudspeakers to the entire region of interest, which includes all desired error microphone locations.
