Objective to investigate the disqualification status due to hearing loss at various frequencies in selection of flying cadets and put forward suggestion on revising the standard.

目的调查招飞听力检查的淘汰情况，探讨修改高频听力损失标准的可行性。

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The units at the base of each speaker vibrate, and these vibrations are then transmitted through the various glass elements above, each of which produces different frequencies of sound.

当每个音响单元的底座开始振动，上面各式的玻璃元件就会把这些振动传送，而在这个过程中每个元件就会产生不同频率的声音。

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The video for this song was shot using different film frequencies, allowing various actions to unfold at different rates within the same frame.

这首歌的视频使用了非常手段，使得一个画面中的各种动作以不同的速度进行。

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By using a tapered cylindrical shape, internal standing waves and resonances are unable to collect to a measurable degree in any area within the enclosure, and in fact cancel themselves out at various frequencies.

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The sensor is a flexible copper-plated sheet patterned with small squares that capture various light frequencies all at once, functioning like one big aperture.

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