Those who design buildings and structures build noise control in from the first planning stage and bring structure-borne noise down to the lowest level as far as is reasonably practicable; AS/NZS 2107 gives recommended design sound levels and reverberation times for building interiors. For a new building the designer should think about how reverberation will affect noise levels; where workstations sit relative to plant and to outside sources such as busy roads or loud customers; choosing frames, floors and machine bases so that every source of disturbance can be vibration-isolated, giving heavy noisy equipment rigid heavy bases and, where possible, bases decoupled from the building frame; isolating sources such as plant rooms; acoustic treatment of noisy spaces, including absorbent ceilings (and walls where ceilings are very high) and floating floors; flexible construction joints; walls, floors, windows and doors that provide the needed sound transmission loss; and carpet in office areas. Where a process can be run remotely, a sound-insulated control room is built from materials with enough transmission loss, with tight seals at doors, windows and cable and pipe penetrations, and with adequate ventilation or air conditioning in hot areas so that nobody props the door open and defeats the insulation.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.