本程序适用于500 Hz和16 kHz之间的制动片模式。本程序测量的参数定义为前三个固有频率fn（n=1、2、3）和相应的损耗系数。

This procedure is applicable to brake pad modes between 500 Hz and 16 kHz. The parameters measured with this procedure are defined as the first three natural frequencies, fn(n = 1, 2, 3), and the corresponding loss factors, ¿¿.