次声

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。

Dust removers have been installed for boilers in many thermal power plants.The sound pressure levels of low frequency noise and infrasonic sound at workplaces were measured.

由于许多火力发电厂锅炉安装了吹尘器，为了解它运行中的低频噪声和次声在工人工作场所的水平，我们对现场进行了测试。

This paper analyzed the advantage and disadvantage of three sound wave focus methods, that is lens focus, curved autofocus, and phased-array focus on the base of draw lessons from supersonic focus technic, consequently preferred and designed the infrasonic phased-array focus system.

文中在借鉴超声波聚焦技术的基础上，分析了透镜聚焦、曲面自聚焦、相控阵聚焦等三种声波聚焦方法的利与弊，从而选用和设计了次声相控阵聚焦系统。

Infrasonic acoustic radiation weapons

次声辐射武器

This so-called "infrasound" can be detected at distances in the order of thousands of kilometers.

这种所谓的&次声&在几千公里远的地方就可以被探测到。

AIM: To measure the frequency and sound pressure of the infrasound in cars and trains.

目的： 测量汽车和火车内环境次声的频率和声压级的分布。

Its main use is in fact the sole purpose is to create a special atmosphere infrasound.

它的主要用途事实上也是唯一用途，就是制造特殊的次声氛围。

Infrasound exists widely in nature, industrial production, traffic and transportation, and military environment.

次声广泛存在于自然界、工业生产环境、交通运输环境和军事环境中。

In Russia, Japan, England and Australia, measurement of environment infrasound was ever performed.

前苏联、日本、英国和澳大利亚等国曾对部分环境次声进行了测量。

Objective To explore the expression of heat shock protein 70 HSP70 in the brain of rat exposed to infrasound.

目的 探讨次声作用后大鼠脑的热休克蛋白70(heat shock protein70，HSP70)的表达。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。