DIN 45635-62-1989 机器排放的空气传播噪声的测量.第62部分:包洛面法.混凝土砖块、板条、管道和预制件生产用机器和设备
Measurement of airborne noise emitted by machines; enveloping surface method; machines and equipment for the manufacture of concrete blocks, slabs, pipes and prefabricated elements
Determination of airborne noise emitted by machines and equipment for the manufacture of concrete blocks, slabs, pipes and prefabricated elements; determination of sound power level using the enveloping surface method for precribed measuring conditions.