Fig. 6
From: Accurate acoustic classification research of visually similar monochrome porcelain fragments
Acoustic analysis of modern ceramic and glass samples. a The firing system diagram and physical photos of samples MY1–4 and MJ1–4. b Physical photos of glass samples Glass 1–3 and Bowl 1–3. c Amplitude-frequency curve of samples. d The relationship between Eli (elastic modulus index) and Δαi (sound loss index) of samples at the three strongest resonance peak frequencies. e Acoustic classification model for ceramics. Scale bars, 2 cm (a), 2 cm (b) and 3 cm (e)
