Reverberant room method for sound power level testing of ventilators 空调风机噪声声功率级测定?混响室法
2.
Industrial fans - determination of fan sound power levels under standardized laboratory conditions - reverberant room method 工业风扇.标准实验室条件下风扇声功率级的测定.混响室法
3.
Industrial fans - determination of fan sound power levels under standardized laboratory conditions - part 2 : reverberant room method 工业用风扇.标准化实验室条件下风扇声功率级的测定.第2部分:混响室法