查询词典 infrasonic

The results showed that the main frequencies were at about 6～100Hz and the sound pressure levels were about 80 dB.Infrasonic sound existed notwithstanding the dust remover was at work or not.

结果显示声音的主频在6～100Hz左右，为次声和低频噪声共存，工作场所声压级在80dB左右。

In the first part, an infrasonic pressure chamber system was established.

第一部分为次声压力仓系统的建立及性能检测。

For example, we can not hear ultrasonic or infrasonic waves..

例如我们听不到的超声波或次声波。）。

Another haunted and related natural phenomenon is known as low-frequency infrasonic sound waves.

另一种与闹鬼相关的自然现象是称作次声的低频声波。

The mechanisms of which could be unbalanced antioxidant system induced by infrasonic exposure.

次声对睾丸的生物学效应与其作用参数有关，抗氧化系统失衡可能是该效应的发生机制。

The church uses a crystal radio system for its music, and only specific infrasonic radio frequencies can interfere with it.

教堂使用水晶无线电系统来播放音乐，只有特定的次声波频率能对其进行干扰。

The frequencies used in sonar systems vary from infrasonic to ultrasonic.

声纳所使用的频率从次声到超声不等。

Proper structure design of the infrasonic monitoring arrays is an effective means to restrain the environment noise and enhance the target infrasonic signal.

次声监测台阵结构的合理设计是抑制环境噪声及增强目标次声信号的一种有效手段。

The spectrum analysis shows that ① Infrasonic waves produced by meteor are mostly very short, lasting one to five minutes;②Periods of the infrasonic waves range mostly from 40 to 408 seconds, and a few waves range from 40 to 480 seconds;③ During 7:21 p.m. to 8:41 p.m. on Nov. 17, the infrasonic waves were much denser. After 8:41 p.m., the waves become more and more sparse, all waves conform to those observed with naked eyes;④ Amplitudes of infrasonic waves from meteor differ significantly from each other (weaker ones below 5 to 10 Pa, medium ones from 10 to 20 Pa, and stronger ones from 20 to 40 Pa). Two of the strongest ones reach 75 Pa and 50 Pa respectively around 7:28 p.m. and 8:07 p.m. on Nov. 17. An explanation of above results is given.

频谱分析结果表明：①各流星产生的次声波大都很短暂，持续时间为1~5min；②流星次声波的周期大都在40~408s；③在1998年11月17日19：21-20：41期间流星次声波仍很密集，20：41后才变得越来越稀疏，恰与肉眼观测结果相符；④流星次声波的振幅彼此相差很大，较弱的在5~10Pa，中等的在10~20Pa，较强的在20~40Pa，最强的两个波在11月17日19：28和20：07前后分别达到75Pa和50Pa。

A tripartite array of infrasonic measurement in Changping county of Beijing was arranged using three CSH-1 infrasonic receivers. The infrasonic signals (P-t curve and wave vector) produced by meteor shower from Leo on November 17 in 1998 were observed.

采用三台CSH-1型次声接收器，在北京昌平县布置了一个次声测量三点阵，观测到1998年11月17日狮子座流星雨产生的次声波P-t曲线和波速波向图。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。