Table 7. Increase in the magnitude (% relative) of the logarithmic decrement of damping with variations in different factors
Indicator
Natural oak
Stained oak
Rad.
Tang.
Rad.
Tang.
Temperature (20°C–100°C)
7
6
6
9
Humidity (0%–40%)
37
31
41
10
Ultrasonic treatment (0–1,200 s)
41
34
37
11
Pulsed magnetic field treatment (0–120 s)
21
29
42
17
Rad.: radial, Tang.: tangential.