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- sound pressure level test 噪声水平测试
- Measurement of sound pressure level for sound sign. 海船声号器具的声压级测量。
- The flow characteristic of the open cavity and the variation of sound pressure level(SPL) caused by a control rod spoiler were investigated by means of numerical simulation and wind tunnel test. 本文利用数值模拟和风洞实验相结合的方法,研究了开式流动腔体的流动机理及设置圆柱控制杆后,腔体内声压级(SPL)的变化。
- Usually, the problem is how to reduce the sound pressure level, either at source or on the transmission path. 通常噪声问题的解决办法就是在其声源处或是在其传播途中降低其声压水平。
- Ultra-low distortion at extreme sound pressure levels. 超低失真的极端声压级。
- 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。
- Objective To study the change and significance of GFAP in thebrain of the mice exposed to infrasound of different sound pressure level . 目的研究不同声压级次声作用小鼠后脑中胶质纤维酸性蛋白(GFAP)的改变和意义。
- Conclusion The extent of GFAP change is closely related to the action times under infrasound of same sound pressure level. 结论马、皮质和下丘脑等区域对次声敏感，次声的作用效应与声压级和作用时间有关；
- The loudness in the hall is introduced and the investigated results are analyzed by the strength and LpF which is the mean sound pressure level of tutti-sound. 介绍了厅堂响度的评价指标,然后利用强度指数和厅堂乐队齐奏强音标志乐段的平均声压级LpF对现有的厅堂调研结果进行分析。
- In this paper, a cab is analyzed with SYSNOISE for the sound pressure level (SPL), structural mode participation factors and acoustic mode participation factors in the cavity. 在计算实例中，计算了由于汽车发动机振动引起的车内噪声的声压级、结构模态的振动参与因子和声学模态的参与因子，分析了引起车内噪声的主要原因。
- After two-grade demarcate, the A/B/C sound pressure level, the gross sound pressure level and the sound power level are produced with the application of A, B, C level fuzzy net. 通过二级标定，引入A、B、C三档模糊计权网络，生成A、B、C三档声级及总声级，求取声功率级，进而依据三段评判对噪声进行进一步的评判。
- INTRACRANIAL SOUND PRESSURE LEVELS DURING IMPULSSE NOISE EXPOSURE Saljo A. 在噪音刺激下颅内声音压力水平。
- It is revealed that acoustic quality is an important consideration in these buildings, and it may vary considerably with the same objective acoustic indices such as sound pressure level and reverberation time. 分析表明了声品质在这类非声学建筑中的重要性, 另外, 即使客观指标例如声压级和混响时间相同, 声舒适度亦可能完全不同。
- The mechanical vibration can be summarized to a new quantity called accumulated acceleration level (AAL) which is comparable with the sound pressure level (SPL) if no acoustical cancellation occurs. 这些数据可用扫描技术在辐射体表面测量。
- There is a remarkably wide range of frequencies and sound pressure levels over which the human ear can detect. 人类耳朵对声音频率和声压级的感应范围很广。
- A special ALC circuit handles very high sound pressure levels but without distortion. 采用特别ALC电路不用担心音量过大而失真.
- Each professor was chosen based upon his or her exposure to various sound pressure levels (SPL). 本试验利用音波的此项特性，对于砂土层滑动所产生之声音进行量测。
- For maximum sound pressure levels large sound reinforcement systems frequently use a separate compressor on each output of the electronic crossover(s). 对于最大的声压电平，巨大的声音增强系统，通常在每一个电子分频器的输出后面拉一个独立的压限器。
- While physical hearing protection can reduce sound pressure levels， they do not adequately prevent NIHL in very noisy environments. 对听力的物理防护可以降低声压水平，但若噪声过强，这种物理防护并不能完全保证听力不受损害。
- maximum sound pressure level of microphone 传声器最高声压级
