Including the principles and the source design, a method of digitally-controlledsound impulse generator is introduced.
研究了一种可控脉冲声生成技术，介绍了声源设计方案以及脉冲声工作生成的主要原理。
2
Of course, a sound configuration management plan must be implemented to ensure that these frequent changes are introduced in a deliberate and controlled fashion.
当然，必须实现可靠的配置管理计划，从而确保以慎重且受控制的方式引入这些经常的变更。
3
On the track, running speed can be controlled with the help of sound markers and visual markers (' beep 'every 50m) or a bike equipped with a speedometer.