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Table 1 Comparison of instrument parameters and the elastic wave velocities of the sandstone samples at the natural state measured using SYC-II and RSM-SY5

From: Acid solution decreases the compressional wave velocity of sandstone from the Yungang Grottoes, Datong, China

  SYC-II RSM-SY5
Frequency range 10–50 kHz 15–100 kHz
Sampling interval 1 μs–10 ms 0.1 μs–200 μs
Sampling accuracy ± 0.1 μs ± 0.1 μs
Reading method Vernier method Vernier method
Measurement of the wave velocity of the sandstone samples at the natural state (n = 6) (m s−1) 4463 ± 108 4429 ± 79