Ultrasound and Wood Science at the Forestry Research Centre in Nancy, France, for a period of twenty years, between 1979 and 1999

Topical Issue - Development of European Acoustics in 20th Century

Open Access

Table 3.

Correlation coefficients between stiffnesses on cores and standard specimens and in static bending test modulus E_L and modulus of rupture in bending (Fagus Sylvatica) [4].

Parameters for statistical analysis	Correlation coefficients
	Ultrasonic test			Static test
	Cubes			Standard specimens
	Increment cores	C_LL	C_TT	C_RR	Density	E_L	Rupture

C_LL	0.673^* * *	–	–		0.704^* * *	0.701^* * *
C_TT	0.766^* * *	0.452^**	–		0.697^* * *	0.561^* * *
C_RR	0.456^**	NS	0.440^**	–	0.$%^* * *	0.380^*
Density	0.877^* * *	0.601^* * *	0.670^* * *	0.980^* * *	0.829^* * *	0.639^* * *

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