All kinds of methods measuring noise have been produced and A-weighting sound level is extensively used as a kind of fundamental measure in all of the world.
针对不同环境下的噪声国际上提出了很多评价方法，目前为世界上广泛应用的是以A声级作为基本评价量的评价方法。
All kinds of methods measuring noise have been produced and A-weighting sound level is extensively used as a kind of fundamental measure in all of the world.
针对不同环境下的噪声国际上提出了很多评价方法，目前为世界上广泛应用的是以A声级作为基本评价量的评价方法。
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