声压级

的SI-28是一个2路与内部无源分频器，它提供了一个单一的系统包出众的带宽和输出声压级全套系统。

The SI-28 is a2 way full range system with an internal passive crossover that provides exceptional bandwidth and output SPL in a single system package .

声压级越高，气溶胶初始浓度越高，颗粒的几何平均偏差越大，停留时间越长，团聚效率越高。

Larger SPL , higher concentration of initial aerosol and longer residence time are more favorable to the agglomeration efficiency .

并且，消雾的效果随着作用声波的频率和声压级（SPL）呈规律性的变化趋势。

And , the dissipating speed of water fog regularly altered following the different frequency and the Sound Pressure Level ( SPL ) .

对1400Hz-3200Hz的声波垂直通过管阵列结构模型前后的声压级（SPL）进行了实验测试，发现了多处频段声压的加强与减弱区。

We tested the sound pressure level before and after the sound ( 1 400Hz ~ 3 200Hz ) passed through the steel array structure perpendicularly .

用实验手段研究了以空气为介质的强驻波声场（声压级大于150dB）对其中微小颗粒群（颗粒直径小于30μm）的作用。

In this article , experiments on tiny particles ( whose diameter is less than 30 μ m ) effected by intense wave field ( whose sound pressure level is larger than 150 dB ) are developed .

AQ12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，恰恰满足了很多需要小巧音箱而满足小空间的场合。

AQ12 has a true natural performance of its greatest feature is lightweight and has a higher sound pressure level , it needs to meet a lot of small speakers and a small space to meet the occasion .

实验结果和理论分析相符，证实了用活塞发生器校准得到的传声器灵敏度值，来校准高声强（声压级在170dB以下）是可行的，这对高声强测试工作提供了方便。

The experiment results were in agreement with the results of the theoretical analysis . The method has proved that microphone sensitivity calibrated by pistonphone can be used for the microphones intended for high intensity sound ( below 170dB ) .

基于谐波控制理论的滚动轴承噪声声压级函数

Sound-Pressure-Level Function of Rolling Bearing Noise Based on Harmonic Control Theory

GB/T16769-1997金属切削机床噪声声压级测量方法

Metal-cutting machine tools & Measurement method of sound pressure level

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 .

簧片的尺寸对圆柱腔型簧片哨发声频率和声压级有影响。

The sound frequency impacted by the size of reeds .

GB/T12303-1990海船声号器具的声压级测量

Measurement of sound pressure level for sound signal appliances by seagoing vessel

不同频谱噪声在相同A计权声压级下的烦恼度研究

A study on annoyance under same A-weight pressure level of different frequencies noise

放空噪声声压级随着氧气压力、排放流量的增大而按对数关系提高。

Its strength was increased with oxygen pressure and outlet flowrate in logarithm relation .

频率和声压级随喷嘴前余压的增大而增大。

Frequency and sound pressure level increase with the extra pressure in front of nozzle .

不同声压级次声对大鼠海马细胞凋亡的影响

Effects of different sound pressure levels of infrasound on apoptosis of hippocampal cells in rat brain

使用这些方法可以降低齿轮的声压级。

With the introduction of these methods , the gear sound pressure level can be decreased .

冲裁加工最大噪声声压级预测模型

Simple model for predicting Blanking noise

吸气管道中风机辐射的声功率级与声压级的关系

The Relationship between Sound Power Level and Sound Pressure Level Radiated by the Fan in a Suck Pipe

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 .

丙烯压缩机末级偶极子气动声源识别GB/T16769-1997金属切削机床噪声声压级测量方法

Dipole Source Identification in Last Stage of Propylene Compressor Metal-cutting machine tools & Measurement method of sound pressure level

针对噪声测试结果，运用平均声压级法和声强平均法对试验数据进行处理。

The method of average sound pressure level and average sound intensity was used for processing noise test data .

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 .

人类耳朵对声音频率和声压级的感应范围很广。

There is a remarkably wide range of frequencies and sound pressure levels over which the human ear can detect .

由于该方法测得的声压级受背景噪声的影响，故只能在消声室中进行。

Since the measuring result is susceptible to background noise , the method can only be carried out in anechoic chamber .

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 .

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 .

其次计算分析了车内噪声的声压级频谱特性以及总声压级空间分布情况。

After it , the spectrum characteristic of sound pressure level and the spatial distribution of overall sound pressure level are also studied .

所得各测点的声压级数值结果与相应的射流噪声试验结果对比，误差不超过6.3%。

The results show that the error of sound pressure level between the numerical and experimental results is no more than 6.3 % .