By using of effective mobility power flow method, vibration level and radiated power level of a element cylindrical shell are studied.

利用有效导纳功率流法研究了基本圆柱壳体的表面振级和声辐射功率级。

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Finally figures of direction coefficient of sound pressure level are given out. Then using these figures the relationship between sound power level and sound pressure level radiated by a fan in...

利用这些图就可方便地得到吸气管道内风机辐射声功率级和声压级的关系。

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Finally figures of direction coefficient of sound pressure level are given out. Then using these figures the relationship between sound power level and sound pressure level radiated by a fan in...

利用这些图就可方便地得到吸气管道内风机辐射声功率级和声压级的关系。

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