A Fuzzy-Based Analytic Hierarchy Process for Mechanical Noise Source Identification of a Diesel Engine

Figure 7

The input partial coherent power spectra of (a) 0–500 Hz, (b) 500–800 Hz, (c) 800–1200 Hz, (d) 1200–1800 Hz, (e) 1800–2500 Hz, and (f) 2500–4000 Hz.

(a)

(b)

(c)

(d)

(e)

(f)