The some noise radiating from machineries jars on human nerves, sensitively, and cause psychological and physiological disease. However, there is no regulation against these sounds as LFS, so a lot of people were persecuted with LFS. The improvement of LFS which radiate from some machines and machineries will be to improve the real structure of machine and machinery which is concerned with mechanical engineer. The paper describe about some cases of trouble due to machineries and show to solved by physical and mechanical technologies only and never to solve by the evaluation under the regulation as reference value against LFS.