An acoustical screen that can be utilized in a variety of applications including as part of a projection screen to cover and hide the presence of an audio speaker. The acoustical screen is formed using multiple hole sizes, e.g., three or more hole diameters or outer dimensions if not round. These differently-sized holes are placed in pseudo-random positions so that there is no perceivable repeating pattern of hole placement in the acoustical screen. By avoiding an ordered grid of holes of a single diameter as in prior speaker grills, the new acoustical screen disguises the visible reflection pattern through non-uniformity. It also provides an improved acoustic transmission surface that allows sound with a greater variety of wavelengths to pass while reflecting a less pronounced echo. The acoustical screen will be in demand for use in entertainment venues using projection systems with speakers positioned behind a front projected screen.