Atomization from a liquid sheet is a critical process particularly in the context of its application in liquid-fueled propulsion systems. The acoustic field in the combustors can affect atomization process by modifying the surface waves on liquid sheet and the droplets leading to time-varying fuel delivery resulting in heat release oscillations to form a closed-loop feedback cycle triggering combustion instability The objective of the present work is to investigate the dynamics of primary atomization of a hollow cone spray from a pressure swirl nozzle in the presence and absence of strong swirling flow when subjected to axial acoustic excitation. This is inferred by comparing the unexcited spray with the excited cases with and without swirl flow. The effect of acoustic pressure and acoustic velocity on the dynamics of primary atomization of the hollow cone spray in strong swirling flow field is also investigated by comparing the spray positioned at different locations in standing wave field with and without swirl flow. Results from high-speed back-light imaging acquired in-sync with dynamic pressure measurements are discussed.