Noise control engineering is a comprehensive field, primarily encompassing three major aspects: identification and control of noise sources, blocking of noise transmission pathways, and protection of noise reception points. Specific tasks involve noise reduction treatments for noise sources such as industrial equipment, transportation facilities, and construction sites, such as installing mufflers and soundproofing covers; designing soundproofing and sound-absorbing solutions for noise pathways, like setting up sound barriers and soundproofing walls; and implementing protective measures in noise-sensitive areas such as residential districts and schools, such as installing soundproof windows and planting soundproofing green belts. Additionally, it includes noise monitoring and evaluation, as well as the establishment and enforcement of noise standards.