谐振频率特性中，电路中的电流大小（电流振幅）随信号源频率的改变而变化，谐振频率fo处的电流振幅达到最大，随着原理fo（两边），振幅越来越小。当电流振幅减小到最大振幅的0.707倍时的频率范围称为信号的通过频带，简称通频带△f，△=f2-f1，单位为Hz。 通过频带△f与谐振电路的“Q”值有关，可用公式表达： Q=fo/(f2-f1)=fo/△f 式中： f——频率，单位为Hz； Q——存储能量对消耗能量的比率。
通过各频带的能量分析，才能获得较准确的频率特性，同时也可以得到原始信号的局部特征。
Through the energy analysis of different frequency bands, we can attain the blasting vibration signals' frequency identity and original signals' part character.
最后通过对能反映源特征的频带信号进行重构，这样能更好更有效的提取声发射信号的本质特征。
At last, we recomposed some frequency band of wavelets, and the results can efficiently extract the features of acoustic emission signal.
通过基于子波的分析方法，对压力数据进行了分析，获得了基于子波系数的频带能量谱和冲击波强度指数。
Pressure data were analyzed by wavelet transform in wavelet domain. Frequency band energy spectrum and intensity index of ISW based on wavelet coefficient were obtained.
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