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1·This new weapon is called a Long Range Acoustic Device (LRAD) .

这种新型武器叫做远程定向声波发射器（LRAD）。

2·Long range acoustic devices, or LRADs, emit sound waves loud enough to cause pain and permanent damage that could be directed towards the pirates.

长程音波设备(声弹)，简称为LRAD，发出声波的声音足够大以至于可以刺痛人并造成不可弥补的损害，这种设备可以用于阻止海盗。

3·And both American and Israeli armies and some less scrupulous police forces around the world are said to have used a sonic tool, the long range acoustic device.

美国和以色列以及世界上做事欠谨慎的警察据说都使用过一种叫做“远程声学装置”的音波武器。

4·Results: the main acoustic output parameters can be measured in the range of permitted errors.

结果：能够在误差允许的范围内测量出主要的声输出参数。

5·Intubation structure can improve the acoustic performance of mufflers and widen the frequency range of mufflers, but its length must be designed according to the exhaust spectrum.

内插管结构能改善消声器的声学性能，拓宽消声频率范围，但设计它的具体长度需要根据排气频谱来选择。

6·The high energy range of acoustic excitation, the peaks of combustion noise and major discrete frequencies are identified.

对声激励的高能量区、燃烧噪声主峰以及一些重要的离散频率分量进行了分析和识别。

7·Tracking target by using anti-helicopter mine (AHM) is actually the bearing-only measurement because precision of range detected by passive acoustic measurement cant satisfy the need of tracking.

目前被动声探测距离精度还不能满足跟踪的需要，因此，反直升机智能雷对目标的跟踪问题归结为仅有角测量的跟踪问题。

8·The results of the range experiment indicate that the air ballistic characteristic tested by this method is directive to the research and development of a rocket-propelled acoustic jamming equipment.

靶场实验结果表明，利用该方法所测出的火箭助飞式声干扰器的空中弹道特性对其研制过程有一定指导意义。

9·Random pulse width modulation technique can be used to distribute voltage harmonics over a wide frequency range and to realize the reduction of acoustic noise and vibration.

随机脉宽调制技术可以使逆变器输出电压的谐波成分均匀地分布在一个较宽的频率范围内，达到抑制噪声和机械振动的目的。

10·Top provider of full range acoustic components: Piezo sounder, Magnetic sounder, Speaker and Microphone/Receiver.

全线声学器件供应商，产品包括：压电发声器，磁性发声器，扬声器及麦克风/听筒。