Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell

Table 2

Effect of 𝛽 values on the design parameters of the optimized shell.

𝛽	𝑅 (m)	ℎ (mm)	𝑁	𝑓1 (Hz)	STL (db)
0	1.6	0.0013	0.393	4	38.6
0.4	1.58	0.00143	0.647	5.5	38.42
0.5	1.51	0.00151	0.817	6	38.57
0.6	1.45	0.00167	1.3	6	38.44