Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 2 Comparison of the resonance frequency of the first mode without the concentrated mass generated by tapping the RT-plane (f _10RT) with that by the free-free bending vibration (f _10FF)

From: Practical techniques for the vibration method with additional mass: bending vibration generated by tapping cross section

Specimen	y-axis	f _10RT (Hz)	f _10FF (Hz)	f _10RT/f _10FF
1	T-direction	253.7500	253.7500	1.0000
1	R-direction	255.0000	255.0000	1.0000
2	T-direction	252.5938	252.8125	0.9991
2	R-direction	245.5938	245.6250	0.9999
3	T-direction	220.6563	220.7500	0.9996
3	R-direction	222.7200	222.8125	0.9996
4	T-direction	231.5750	231.7500	0.9992
4	R-direction	236.0250	236.0000	1.0001
5	T-direction	218.6500	218.6000	1.0002
5	R-direction	220.0000	220.0000	1.0000

y-axis: refer to Fig. 2, f _10RT: Tapping 1 and Microphone placement 2 in Fig. 2, f _10FF: Tapping 2 and Microphone placement 2 in Fig. 2

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