The feature would be even better if the built-in speakers weren’t on the back of the device, muffling the sound if you place it screen up on a flat surface.
如果内置扬声器不是装备在机器的背面，这个功能会更加出色。 因为当你屏幕向上把Kindle放在平坦的表面上时，声音会被压低。
The perforating shield contributes a lot in improving the muffling effect and at the same time has a function of eliminating the pulsating sound in the engine exhausting noise.
穿孔屏对改善消声效果有较大的作用，同时，对发动机排气噪声中的脉动声有较好的消除作用；
The sound absorbing device (22) is provided with a plurality of mutually different absorption areas (24) on the aspect of depending on the muffling performance of the frequency.
吸声装置(22)具有多个在其取决于频率的消声性能方面相互不同的吸收区(24)。
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