G. G. Parfitt 
+40 
RESPONSE RATIO (db) 
b 
fe) 
0.1 ! 10 100 1000 
Fig. 4.3. Response ratio of a mount on an elastic foundation (schematic), 
+40 
{eo} 
RESPONSE RATIO (db) 
b 
{e) 
0. | 10 100 1000 
Fig. 4.4. Response ratio of a mount on a resonant foundation (schematic), 
71 
