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From the noise pollution angle, the changes in the industry profile over the last 10 to 20 years have been helpful in complementing Singapore’s noise control efforts. There are now relatively fewer noisy workplaces in Singapore. The incidence of noise induced deafness has dropped from 10.6 per 10,000 employed persons in 1976 to 1.2 in 2004.

The average noise levels in workplaces monitored have decreased progressively in recent years. However, some industries continue to pose challenges. For example, in metalworking and aerospace industries, as well as steel mills, exposure levels can be as high as 105 dBA. Noisy processes that are inherently difficult to control include steel forging, engine testing, metal cutting and stamping.