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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

From: Construction and recognition of acoustic ID of ancient coins based on deep learning of artificial intelligence for audio signals

Fig. 4

Acoustic parameter curves of ancient coin samples: a time domain curves for one training audio and two test audios of the QLTB1 sample, b frequency domain curves for one training audio and two test audios of the QLTB1 sample, c time domain curves for the two test audios with couplant and the two test audios without couplant for the sample KYTB2, and d frequency domain curves for the two test audios with couplant and the two test audios without couplant for the sample KYTB2

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