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SCMP Reporter

VEHICLES and commercial businesses have been found to be the main causes of noise pollution in most busy districts of Hong Kong, according to a recent survey.

   The survey was part of a joint ''noise measurement campaign'' launched by Green Power and the Open Learning Institute of Hong Kong to enhance awareness about air and noise pollution.

  The survey, carried out between May 28 and June 4, measured noise levels in 10 districts with most environmental complaints during the past year, covering residential areas, youth entertainment centres and areas along roads.

  Results showed the impact of noise increased with traffic and commercial activities in the areas, said Green Power chairman Simon Chau Siu-cheong.

    The major culprits in busy districts such as Causeway Bay, Mongkok, Central and North Point were found to be vehicles and shops.

 ''The average sound level in these areas is 75 decibels during the day. It can be over 89 decibels if there is any on-going road or building construction,'' said Dr Chau.

  The average sound level during the night was found to be over 70 decibels, which is five to 10 decibels higher than the level recommended by the Environmental Protection Department.

  In areas along the coast such as Shau Kei Wan and North Point, the noise came mainly from vehicles - mostly through friction between tyres and the road surface.

   ''Within 50 metres of the fly-over, the average sound level can reach 80 decibels or higher and around 75 decibels after 11 pm,'' added Dr Chau.

  Noise from shops and food stalls contributed most to the pollution problem in residential areas.

   ''The sound level ranges from 65 decibels to 75 decibels in Mongkok, Kwun Tong, Chai Wan, Shau Kei Wan and Tai Hang during the day but remains at over 65 decibels after 11 pm.''   According to Green Power, lengthy stays in areas with 70 to 75 decibels' sound level could cause nervousness and even deafness.

  Dr Chau suggested segregation of residential areas and fly-overs and the use of carpets to reduce noise levels in commercial organisations.



Vehicles, shops noise culprits