Acoustic characteristic parameters的用法和样例：
- For example, some people researched the mechanism of the underwater acoustic signals, prove the signals that have chaotic features, and some of them extracted the characteristic parameters.
- According to characteristics of an acoustic emission signal induced by a punching die when it failed, the characteristic parameters of failure signal were determined.
- The characteristic parameters in the time-domain are obtained by applying Gauss wavelet to envelope analysis (EA).
- The built system could pick up sound signals within effective time by acoustic sensor and the MFCC characteristic parameter was chosen as observation sequence.