7年的使用实践表明，直流脉动电压频率调制技术对抑制声谐振现象十分有效。
The7years 'applicable practices indicate that the frequency modulation technology with dc bus voltage ripples is very effective to suppress acoustic resonances.
实验研究了矩形空腔在外部高速气流作用下诱导的空腔内流动振荡问题，以及从空腔前缘加入纯音声激励以抑制空腔内流动振荡的技术。
The flow induced oscillation in a cavity exposed to external high speed flow and its suppression by means of sound excitation at the leading edge of the cavity are experimentally studied.
但是，目前市面上的自动声反馈抑制产品，大多是国外品牌，价格不菲。
However, most of automatic feedback suppressors in domestic market are imported from oversea and expensive.
本文叙述抑制声反馈的频移器的设计，并进行了实验研究。
This paper describes the design of a frequency shifter to suppress acoustic feedback, to be studied by the experimental method.
结果发现：掩蔽声对神经元放电率的抑制作用在时间上表现为前抑制（41%）、后抑制（9%）和全抑制（50%）三种类型。
We found that there were three types of inhibition period of neuronal firing, i. e. , early-inhibition(41%), late-inhibition(9%)and whole-inhibition(50%).
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。
Proper structure design of the infrasonic monitoring arrays is an effective means to restrain the environment noise and enhance the target infrasonic signal.
如何合理有效地抑制声反馈，提高扩声系统增益是衡量扩声系统性能的重要依据。
How to reduce acoustic feedback and enhance the maximum usable gain of sound reinforcement system is one of the most important terms to evaluate the performance of the sound reinforcement system.
汽车车身模型风洞实验表明，用内部声激励可获得有效的减阻效果，而且还能起到抑制气动噪声的效果。
A wind tunnel test for a model of the automobile body shows that beneficial effects on reducing drag and suppressing aerodynamic noise by using internal acoustic excitation.
对声回声必需进行抑制，否则会严重影响通信系统的性能，引起啸叫等失效状态。
At last they were sent back to the far-end and generated acoustic echoes. This kind of echoes must be suppressed in the modern communication systems.
对声回声必需进行抑制，否则会严重影响通信系统的性能，引起啸叫等失效状态。
At last they were sent back to the far-end and generated acoustic echoes. This kind of echoes must be suppressed in the modern communication systems.
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