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11.2kW鼓风机测定和估算的声功率级之比较径向鼓风机在工业上使用极为普遍,因此,它们的设计和制造都很粗糙,在现行使用的风机中,可能是最吵闹的一种.为了检验11.2kW鼓风机的声功率,将其与目前正在使用的同类风机的声功率级作比较.在每个倍频程频带中,利用Graham提供的方法和图表对风机声功率级进行估算.在63到8000Hz的倍频程频带上的声功率级可以
Comparison of sound power levels measured and estimated by 11.2kW blowers Radial blowers are very commonly used industrially and are therefore very rough in design and manufacture and may be the most noisy in existing fans. The sound power of the 11.2kW blower is compared to the sound power level of the same type of blower currently in use.According to the methods and charts provided by Graham in each octave band the fan sound power level is estimated.At 63 to 8000Hz octave band sound power level can be