This paper focuses on acoustic modeling for active noise control applications. The desired model must be nite dimensional and ecient numerically to meet implementation requirements. It also must be parameterized by the position considered inside the cavity. This additional characteristic is desirable for addressing specic active noise control applications such as optimizing microphone placement, estimating acoustic pressure at dierent positions of the considered cavity and nally attenuating noise level in a subarea of the cavity. The main contribution of this paper is to propose a nite-dimensional, low-order, and parameterized acoustic model of a cavity, suitable for active noise control applications. The resulting model is dened as a gray box that combines a one-dimensional analytical model of acoustic propagation, which handles the physical parameterization, and a black-box model that copes with actuator and sensor dynamics as well as modeling errors. The parameters of the proposed model are optimized in order to reproduce the frequency behavior of the real system (LS2N active noise control platform) in a frequency range. This model allows one to accurately reproduce the dynamics at any position in the considered cavity. The prediction performance of the proposed model was compared to a classical black-box model (usually used for active noise control applications) and validated experimentally using the LS2N active noise control platform. The analysis highlighted that the proposed gray-box model can predict the acoustic behavior in a great range of positions.