378361.fig.006a
(a) Synthetic echo spectrum of a chestnut veneer from a distance of 20 cm
378361.fig.006b
(b) Synthetic echo spectrum of a cherry veneer from a distance of 20 cm
378361.fig.006c
(c) Synthetic echo spectrum of a maple veneer from a distance of 20 cm
Figure 6: Frequency spectra of echoes from synthetic pulses from different wood veneers.