最终结果均应折算至声功率级。
声压级及声功率级的测量和计算。
Measurement and calculation of sound pressure level and sound power level.
脉冲声压级、声功率级、声功率随爆震频率的提高而提高。
Impulse sound pressure level and sound power level and sound power increase along with the increasing of detonation frequency.
因此，声强技术同样适用于微特电机等低噪声声功率级测定。
So the sound intensity technique will be a wide range of applied prospects in the lo…
给出了离心压缩机气动参数和结构参数与声功率级之间的内在关系。
The intrinsic relation between the pneumatic parameter, structural parameter and acoustic power level for centrifugal compressor is given.
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。
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...
通过平均声压级和声功率级的测试验证了复合钢板试制的油底壳的降噪效果。
With the measurement of average sound pressure level and sound power level, the noise reduction result of the oil pan made by sandwich steel plate was proved.
由于油底壳担负着机油散热功能的特殊性，试验对油底壳采用半约束阻尼包裹处理，结果显示整机声功率级降低了1。
Oil pan shoulder function due to the uniqueness of oil cooling, so the oil pan was semi-damping enwrapped in the experimentation , The results showed a piece of sound power level lower 1.
混响室是声学专业的实验室用房，它在测量声波无规入射时材料的吸声系数和测量噪声源的声功率级中得到了广泛应用。
In the measurement of sound absorption coefficient in random incidence and determination of sound power levels of noise sources, the reverberation room is used very extensively.
本文介绍了一种毫瓦级超声功率测量计的研制。
This article presents the development of a milliwatt ultrasound power measurement system.
目前，我军各级医学计量单位普遍使用BCZ100 - 1型便携式毫瓦级超声功率计作为超声诊断设备的计量仪器。
Now, the BCZ100-1 ultrasonic power meter, as a metric instrument of medical ultrasonic diagnostic equipment, is widely adopted by medical metric departments.
本文给出了频标放大器输出级相位噪声功率谱密度的公式。
A formula of phase spectrum density for transistorized amplifier is given.
接着推荐美国宾州大学噪声控制研究室关于喷流声功率与声压级的经验公式。
Some experimental formulae about jet sound power and jet noise pressure which are contributed by the noise Control Laboratory of the Pennsylvania State University are recommended.
接着推荐美国宾州大学噪声控制研究室关于喷流声功率与声压级的经验公式。
Some experimental formulae about jet sound power and jet noise pressure which are contributed by the noise Control Laboratory of the Pennsylvania State University are recommended.
应用推荐