Sound masking is the process of adding a low level, unobtrusive background sounds to an environment to reduce the intelligibility of human speech and reduce noise distractions in that environment. It is a key tool to help solve the speech privacy problem.
Sound masking systems can be installed in a direct field position, in which the speakers point downwards from the ceiling and sound masking is emitted directly into the office space. This approach helps create a uniform and evenly distributed sound field.
Sound masking can also be installed in an indirect position, in which the speakers are hidden above the drop ceiling and the sound masking is pointed upwards and reflected off the ceiling deck and back into the environment.