摘要 : The dangers presented by noise from machinery to physical and psychological health are discussed, with reference to the duration, frequency, intermittance and distance of exposure to noise in open spaces. Notes are provided on ind... 展开 The dangers presented by noise from machinery to physical and psychological health are discussed, with reference to the duration, frequency, intermittance and distance of exposure to noise in open spaces. Notes are provided on indirect effects and the control of noise in green spaces. Methods of reducing noise at the source are also considered.. 收起