Regularities of pressure on surface with sound pressure level and frequency are also given.

并给出了模型表面压力随声压级及频率变化的规律。

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Besides, the influences of sound pressure level, residence time and initial total number concentration on agglomeration were investigated.

同时，研究了声压级、停留时间和气溶胶初始浓度等参数对声波团聚的影响。

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Measurement and calculation of sound pressure level and sound power level.

声压级及声功率级的测量和计算。

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Stephen Pope, global equity strategist at Cantor Fitzgerald in London, says there are still a number of undetermined issues, including the pressure reading which is still short of the level that BP itself has said it needs to see to declare the well sound.

FORBES: Bottom-Fishers Still Leery Of BP Stock