语音录放芯片ISD4004完整的C代码源程序－C51编写，该程序在驾驶员考试系统车载考试设备中长期稳定使用，灵活方便，效果良好-Voice Recorder ISD4004 chip complete C source code-C51 prepared by the procedures in the examination system driver-vehicle test equipment and long-term stability in use, flexibility, goo

铁路运输通信数字式语音记录仪技术条件及实验方法，调度指挥工作中记录通信语音及相关事件的标准。-The technical condition of railway transport communication digital voice recorder and experimental methods, the standard of communication of voice and related events recorded in the dispatch command work

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