Magnetohydrodynamic (MHD) waves play an important role in the dynamics and heating of the solar corona. The study of these waves provides us with information on the local conditions of corona. Transverse oscillations are commonly observed in the corona, usually in response to solar eruptions. Though typically studied separately from other MHD waves, it has been shown that there are a number of physical processes which can induce coupling. Of interest is coupling at the footpoints which has been observed as propagating intensity variations at the loop footpoints. In this work we extend the one-dimensional model of this acoustic coupling to a two-dimensional slab model loop (arcade). Initially we limit our analysis to a slab model with no longitudinal structure. Once we understand the effect that transverse structure has on this coupling, we will extend our model to include a transition region. In this study we combine analytical wave modelling with fully non-linear MHD simulations to analyse this coupling. We find that transverse loop oscillations result in the generation of propagating slow magnetoacoustic waves with the same periodicity but shorter wavelength determined by the local sound speed. In our first model the waves are generated at the line-tied boundaries. In the second model we find generation from the top of the transition region and the lower boundary. We also find that in the second model that the rate of excitation is smaller at the lower boundary due to the reduced local sound speed. In both models the the coupling is found to be proportional to the plasma-β and slow magnetoacoustic wave field is anti-symmetric in the direction of transverse wave polarisation, which highlights the importance that the loop orientation has on the observability of these waves. We also show, using synthetic diagnostics, that for the interpretation of intensity oscillations associated with typical loop oscillations the ponderomotive response also needs to be taken into account. The ponderomotive effect must be accounted for when interpreting intensity oscillations. With longitudinal structuring we find evidence for an additional short-period oscillation, which we suggest is likely due to a hybrid mode.