Summary: How to obtain good sound comfort on trains? 总结：如何获得良好的列车声音舒适度？
SPL 65-70 dBA
Acoustically well designed vehicle / 声学上设计良好的车辆
No rattling noise from interiors / 内装无噪音
Fasten interiors properly (dampers can be used) / 内装件安装牢固（可采用减震器）
Avoid tonal noise from fans or drive system / 避免传动系统风机的音调噪音
Acoustically optimized and vibration isolated auxiliary and drive systems / 声学上经过优化的和振动隔离的辅助及传动系统
High frequencies > ~2 kHz shall be very well damped / > ~2 kHz的高频噪音应得到较好的吸收
Increased absorption in compartment / 客室内增强了振动吸收
Privacy in vehicle throughout journey / 旅途中车辆的私密性
Use of HVAC system as a masking sound at standstill / 列车静止时运转HVAC系统作为掩蔽声
这是一篇关于车辆降噪的，可以吗？
