In recent times, warfighting has been taking place not in far-removed areas but within urban environments. As a
consequence, the modern warfighter must adapt. Currently, an effort is underway to develop shoulder-mounted rocket
launcher rounds suitable with reduced acoustic signatures for use in such environments. Of prime importance is to
ensure that these acoustic levels, generated by propellant burning, reflections from enclosures, etc., are at tolerable levels
without requiring excessive hearing protection. Presented below is a proof-of-concept approach aimed at developing a
computational tool to aid in the design process. Unsteady, perfectly-expanded-jet simulations at two different Mach
numbers and one at an elevated temperature ratio were conducted using an existing computational aeroacoustics code.
From the solutions, sound pressure levels and frequency spectra were then obtained. The results were compared to
sound pressure levels collected from a live-fire test of the weapon. Lastly, an outline of work that is to continue and be
completed in the near future will be presented.