Noise producing industries, airports, vehicles should be far from residential areas as it very dangerous for infants and senior citizens.
Community law should check use of loudspeakers, outdoor parties as well as political public announcements.
There should be control on noise level (Silent zones) near schools, hospitals. Place noise limits boards near sensitive areas.
We can plant more trees as they are good noise absorbents. According to studies it can reduce noise by 5 to 10 decibels Db around them.
We can use proper lubrication as well as better maintenance of machines to reduce noise pollution and improve efficiency. It reduces friction between movable parts and helps to reduce noise.