The Code of Practice for Selection, Use, Care and Maintenance of Hearing Protectors⁷, 1999: provides information and guidance to persons who supply, purchase or wear hearing protectors, and sets criteria and standards on their selection, care and maintenance.

The Code of Practice for Industrial Noise Control⁸, 2002: provides detailed technical information on noise and vibration control for acoustic specialists, plant engineers, safety and health professionals, technical personnel and those who wish to apply practical measures to control noise and vibration, as well as guidance on planning for noise control at the plant design stage. It stipulates the roles and responsibilities of factory occupiers and appointed competent persons with respect to noise monitoring, noise control planning and noise hazard management. The Code includes worked examples on engineering noise control such as the use of acoustic barriers, enclosures, partition walls, silencers, isolators, sound absorbing and damping materials.