دراسة و حساب الضجيج الناتج في المدن عن حركة وسائل النقل

Noise could be considered one of the source that negatively affects the population in the big cities . These effects increase with time on the human nerves system, while decrease the work ability the noise could be the cause of many heart attack , nerves and stomach problems . Therefore , many countries , suggested limits and standards to face (meet) the noise problems. The transportations play the main reason of noise-production problems in the cities reached to about (80%) of the total problems. Therefore , our present work includes studying and analyzing the noise produced by these vehicles in the cities . also we suggest a special method for its calculation and solution to reduce its effects and harm full as much as possible …