The Noise is controlled  by providing Acoustic lining on walls & ceiling, all ordinary doors / shutters are to be converted in to sound proof doors in DG  Rooms  Acoustic Treatment  . The proper Air ventilation system is designed to allow the maximum aspiration and cooling airflow required so the engine does not overheat. Axial flow fan of required size & number provided for proper Air ventilation. Acoustic louvers, splitter & Insulated ducts are provided to suppress the noise where required.