In order to optimally measure and detect the sound propagation of damage, the position of the sensor must be carefully selected. Although it is often not possible to mount a sensor at the absolute best position, this is not always necessary. Since sound waves propagate throughout the entire structure, the damage frequencies can be measured at various locations with varying intensity or amplitude (green arrow). If a flexible connection is used, a valid measurement is no longer possible (red arrow).
为了最佳地测量和检测损坏的声音传播，必须仔细选择传感器的位置。尽管通常不可能将传感器安装在绝对的最佳位置，但这并不总是必要的。由于声波在整个结构中传播，可以在不同的位置测量不同强度或振幅的损伤频率（绿色箭头）。如果使用柔性连接，则无法再进行有效的测量（红色箭头）。
Fig.: Suitable and unsuitable sensor attachments
图: 合适和不合适的传感器附件