Vibroacoustical Analysis of Multiple-Layered Structures with Viscoelastic Damping Cores

Table 5

First damped frequency, loss factor and SPL (simple supported BC).

Type	Temp-°C	Freq-rad/s	Loss factor	SPL-dB
3M ISD-110	40	33.17	1.085	50.35
	45	28.82	0.7899	51.91
	50	26.25	0.5847	54.15
	55	24.38	0.464	56.24
	60	23.5	0.387	57.45
3M ISD-112	40	32.65	0.1946	59.54
	45	31.62	0.1652	61.25
	50	30.8	0.1413	62.30
	55	30.15	0.1218	62.90
	60	29.61	0.1057	63.21
3M ISD 110 & 112	40	32.88	0.4427	54.31
	45	30.76	0.3506	56.45
	50	29.3	0.2776	57.68
	55	28.22	0.2252	58.05
	60	27.54	0.185	59.67