引用奥组委对最大声压级的具体要求。
The maximum sound pressure level standards of Beijing Olympic Organizing Committee is introduced.
该系统可排列更多的覆盖面和声压级的要求。
The system can be arrayed for additional coverage and SPL requirements.
振动用加速度有效值描述，噪声以声压级表示。
The vibration is characterized by the virtual value of acceleration, and the noise is indicated by the sound-pressure-level.
在2190年提供了大量的119分贝最大声压级。
喷注与鼓泡产生的噪声具有频带宽、声压级较高的特征。
The noise from injection and bubbling has the character of wide frequency band and high noise 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.
“通过”连接声压级允许容易额外SH1294M系统并联。
"Thru" connections allow easy paralleling of additional SH1294M systems.
为了在工程上应用，特别建立了最优滚动轴承噪声声压级函数。
The function of the optimum sound pressure level of the rolling bearing noise is established especially for applications to engineering.
基于心理声学模型的掩蔽特性，可以得出水印被要求的相应的声压级。
Based on the masking properties of the psychoacoustic model, we then derive the required sound pressure level of the watermark.
这个强大的低音系统，能够提供非常低的持续时间超过失真高声压级。
This powerful bass system is capable of delivering high sound pressure levels with very low distortion over sustained periods.
通过直管噪声与带消声器的尾管声压级的对比，发现在低频段有一峰值。
We make a comparison in tailpipe noise between straight pipe and muffler, it is seen that there is a sharp peak in low frequent.
探讨了小孔泄漏气体噪声频谱中某一频段声压级与雷诺数之间的函数关系。
The function relationship between acoustic intensity of eyelet leak noise frequency section and re was discussed.
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...
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。
Besides, the influences of sound pressure level, residence time and initial total number concentration on agglomeration were investigated.
对于冲击面为凹面的冲击射流，远场噪声总声压级对喷嘴位置改变非常敏感。
For a jet impinging onto a concave plate, the OASPL of the far-field noise is quite sensitive to position variations of the nozzle.
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.
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.
声压级在相交激波点附近出现剧烈变化，喷管出口处的激波和排气羽流造成强噪声。
The sound pressure level changes acutely in shock intersection, and shocks outside nozzle and exhaust plume cause strong noise.
对比分析不同激振情况下，踏面径向振动与辐板轴向振动对噪声声压级的贡献比例。
Compared of different contributions of the tread vibration and the web vibration on sound level of railway noise.
在相同的频率和声压级水平下，次声的损伤作用与次声的暴露时间并非呈线性关系。
Under the same frequency and same sound pressure level, the infrasound damage on the brain didn't show linear correlation with the acting time of infrasound.
声学。测听设备校准用参照区。第1部分：纯音和耳挂式耳机的参考等效阈声压级。
Acoustics - Reference zero for the calibration of audiometric equipment - Part 1 : reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones.
得出，当激振点不变时，激振力级的变化与振动模态辐射的平均声压级成线性关系；
When the exciting force was constant the average level of sound radiation produced by modal vibration has a linear relationship with the level of mode shapes.
在已知内层壳体振动速度的情况下，计算出流场中距外层壳体一定距离处的声压级。
The sound pressure level at certain distance from the outer shell in flow field is obtained when the vibration velocity of the inner shell is known.
声压级增大不仅使团聚核函数增大，也增大了碰撞效率，使高声压级时的团聚更有效。
Higher sound pressure level (SPL) favored both collision efficiency and agglomeration kernel, so acoustic agglomeration increased in the higher-intensity acoustic field.
MD - 12有着真实自然的表现，其最大的特点就是轻巧而又拥有较高的声压级。
MD-12 has a true natural performance features of its biggest is lightweight and has a higher sound pressure level.
推导线性谱声压级、倍频带声压级以及各倍频带声压级之间的转换公式，计算出修正值。
The formulas for the transformation of sound levels between linear spectrum and multiplex frequency band, or among various multiplex frequency bands, are derived and the corrected value is calculated.
该条给出了电话耳机处相对于该耳机发出的声压级的，所建议的感应场的强度级和频率特性。
It presents recommended levels and frequency characteristics for the inductive field at the telephone earphone relative to a sound level presented at the same earphone.
不同声压级下窄带噪声对纯音同时掩蔽效应的实验结果表明：掩蔽曲线可以用两段直线来近似。
Experiments on simultaneous mask effect where tones were masked by narrow-band noises with different SPL showed that the masking curve could be approximated as two segments of straight line.
在有多个噪声源的情况下，通过推导声压级分贝值的运算公式，得出了判定主噪声源的有效方法。
Under the circumstances that there are multi noise sources, we can get the effective method of how to judge main the noice source by deriving the formula of acoustic pressure evel decibel.
计算结果正确预测出近场中低频段的指向性特点和远场声压级水平，与实测谱值有较好的一致性。
It has been verified that the directional characters in near sound field in low and middle frequency bands and the pressure level in far...
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