Recognition Algorithm of AE Signal of Rock Fracture Based on Multiscale 1DCNN-BLSTM

Figure 11

AE signals with signal-to-noise ratios of 0, −3, −6, and −9 dB, respectively. (a)  = 0 dB noisy signal. (b)  = 0 dB noisy signal corresponding spectrum. (c)  = −3 dB noisy signal. (d)  = −3 dB noisy signal corresponding spectrum. (e)  = −6 dB noisy signal. (f)  = −6 dB noisy signal corresponding spectrum. (g)  = −9 dB noisy signal. (h)  = −9 dB noisy signal corresponding spectrum.

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