A fluid dispersion assembly comprises a diffusion unit disposed in fluid communication with a fluid container, the assembly being powered by a compressed air source. The diffusion unit at least partially defines a diffusion chamber, and includes a diffusion assembly containing an atomizer assembly which, in combination with the diffusion chamber, generates a fluid dispersion from a mixture of compressed air and an operative fluid, for example, fragrant oils, essential oils, odor neutralizers, disinfectants such as triethylene glycol, air sanitizers, etc. The diffusion unit may include a suppressor assembly and/or a silencer assembly to reduce the amount of noise generated during operation. In one alternate embodiment, a modified diffusion chamber is provided which functions as a suppression chamber, thereby reducing the noise generated during operation of the assembly.