... Bidirectional 双向性的，8字型指向的 Bifess Bi-feedback sound system 双反馈系统 Big bottom 低音扩展，加重低音 ...
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Besides, sometimes sound can be used to offer signals and feedback on a system when no display is immediately handy.
此外，在没有直接可用的显示时，还可以用声音来向系统提供信号和反馈。
The frequency of the sound wave is controlled by the feedback signal of the system.
声光晶体由行波场驱动，声场频率则由系统的反馈讯号控制。
The acoustic feedback even howling is a well-known problem in sound reinforcement system.
扩声系统中普遍存在由声反馈导致的啸叫问题。
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