Table 4: Summary of acoustic parameters of natural pulses from three different wood species.

Wood Acoustic parameters (mean ± standard deviation)
𝐹 1 (Hz) 𝐹 2 (Hz) 𝐹 3 (Hz) RT (ms) 𝐼 (dB)

Chestnut 4 8 . 8 ± 1 . 6 5 4 3 ± 4 0 1 0 3 4 ± 9 0 . 7 6 ± 0 . 0 7 5 6 . 4 8 ± 2 . 0 6
Cherry 5 2 . 8 ± 1 . 8 5 5 3 ± 5 2 9 4 0 ± 0 0 . 8 9 ± 0 . 1 2 5 1 . 6 3 ± 2 . 3 3
Maple 6 4 . 8 ± 2 . 4 5 1 5 ± 0 1 3 4 2 ± 2 3 0 . 9 5 ± 0 . 1 3 5 7 . 1 4 ± 2 . 9 8

𝐹 1, 𝐹 2, 𝐹 3: frequency bands (Hz); RT: rise time (ms); 𝐼 : intensity (dB).