Table 1.

The measured peak frequency of the imaginary effective dynamic mass of each DMR damper used in the experiments.

Damper #	#1	#2	#3	#4	#5	#6	#7	#8
Group-1	99.3	99.3	105.2	105.3
Group-2	96.2	98.2	100.4	101.4	101.6	101.8	102.8	104.2