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。
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。
A stereo effect is achieved through differences in sound pressure level between two microphones.
立体声效果是通过在不同的声压水平之间的两个话筒。
The maximum sound pressure level standards of Beijing Olympic Organizing Committee is introduced.
引用奥组委对最大声压级的具体要求。
Impulse sound pressure level and sound power level and sound power increase along with the increasing of detonation frequency.
脉冲声压级、声功率级、声功率随爆震频率的提高而提高。
The sound pressure level changes acutely in shock intersection, and shocks outside nozzle and exhaust plume cause strong noise.
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。
Based on the masking properties of the psychoacoustic model, we then derive the required sound pressure level of the watermark.
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。
The function of the optimum sound pressure level of the rolling bearing noise is established especially for applications to engineering.
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。
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。
Sound pressure level (SPL) sound pressure level is a measurement of the pressure fluctuations of a sound wave as it propagates through the air.
声压级别声压级别是表示在空气中传播的声波的起伏压。
A global transfer function (g) representing a spatial average of sound pressure level in the room generated by the loudspeaker (L1) is determined.
确定表示由扬声器(L1)生成的在房间中的声压水平的空间平均值的全局传递函数(G)。
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.
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。
Booster compressor noise has the characteristics of wide frequency band, intense low frequency sound and considerably high total sound pressure level.
增压机噪声具有频带宽、低频声强烈，且总声级又相当高的特性。
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.
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。
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.
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。
Protection of ear to reduce sound pressure on it is necessary if the ear is to be subjected to noise at a sound pressure level more than 85 decibels continuously.
如果耳朵要连续承受声压为85分贝以上的噪音，则必须加以保护，以减低它所承受的声压。
Higher sound pressure level (SPL) favored both collision efficiency and agglomeration kernel, so acoustic agglomeration increased in the higher-intensity acoustic field.
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。
By Combining acoustics with electrics, and based on sound pressure level a calculating method was presented to determine the magnititude of electric-power inputting to sound-box.
将声学原理与电学原理结合起来，提出了一种根据空间声压级确定输入到音箱中的电功率大小的计算方法。
The regularities of the combustion chamber noises are analysed based on the numerous measurements obtained, and the predicted models of the total sound pressure level are also given.
根据大量的测试结果分析了燃烧室噪声的规律和总声级的预测模型。
If the toy has a clearly defined operating cycle, measure the time average (the equivalent continuous) sound pressure level in each microphone position during at least one whole cycle.
如果被测玩具有明显的运行周期，至少在一个完整周期内测得每个麦克风的按时平均(均等连续)声压水平。
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。
The minimum fluidization velocity has a minimum value when the frequency of sound waves approached 150 Hz, whereas it decreased as the sound pressure level was increased at the same sound frequency.
气泡尺寸和鼓泡频率随声压的增大而减小，随声波频率的增大先减小后增大。
It has been verified that the directional characters in near sound field in low and middle frequency bands and the pressure level in far...
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。
Dynamic pressure Sensors can measure a wide range of varying high intensity sound pressure and high level dynamic pressure events.
该传感器可测量各种不同的高强度声压和高水准动态压力。
The vibration is characterized by the virtual value of acceleration, and the noise is indicated by the sound-pressure-level.
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.
振动用加速度有效值描述，噪声以声压级表示。
应用推荐