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焦柳线怀化南站至张家界站货物列车运行时守车内部噪声水平测量结果，上行和下行纯运行时间等效声级分别为８７．８ｄＢ（Ａ）和８８．２ｄＢ（Ａ），平均语言干扰级７１．０ｄＢ（ＳＩＬ）；噪声水平与运行速度有关，随运行速度增快而增高，隧道内运行时，等效声级与运行速度成正相关（ｒ＝０．６８７，ｙ＝７９．７４＋０．１２ｘＰ＜０．００１）；通过整体道床隧道时，守车内部噪声水平比普遍道床高，而坡度和长度对守车内部噪声水平无明显影响。
The results show that the equivalent sound level of up-going and down-going pure running time are 87.8dB (A) and 88.2dB (A) respectively, mean speech interference Level 71.0dB (SIL). The noise level is related to the operating speed and increases with the operating speed. In the tunnel, the equivalent sound level is positively correlated with the operating speed (r = 0.687, y = 79.74 + 0). 12xP <0.001). When passing through the track bed tunnel, the internal noise level of the caboos is higher than that of normal road beds, and the slope and length have no significant effect on the internal noise level of the caboos.