据了解，此次抗战胜利70周年阅兵，共有315名工程师承担阅兵声音保障任务。他们在天安门广场以及长安街区域布设了300多支话筒、62个声音基站、38个调音台及140只流动音箱。此次阅兵现场声音种类的繁杂是前所未有的，使得声音收集工作变得非常复杂。

[声音收集无死角]

In order to convey neat and uniform sound of footsteps of march-past, apart from installing fixed sound-collecting microphones, technicians have to follow the formation carrying a microphone stick to collect their sounds. The amplifying systems on Tian'anmen Square in this parade cover vast areas from Jianguomen to Xidan, to ensure unified sound effect in every corner of the square.

为了传递出整齐划一的分列式脚步声，除了布设固定的拾声话筒外，还有技术人员举着话筒杆，朝着脚步行进方向跟随收声。本次阅兵，天安门广场的扩声系统覆盖了从建国门到西单的广阔区域，保证在广场上任何角落都能听见一致的效果。

[口令员精准发声]

Order-givers in the phalanxes are responsible to give loud orders on the Tian'anmen Square for soldiers to hear. Besides, they should notice not to give orders when guns fire salute. There are standards for how long one order lasts, the strong beat and off beat in the order, as well as the rhythms.

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