Analysis of Acoustic Characteristics of Arbitrary Triangular Prism and Quadrangular Prism Acoustic Cavities

Table 2

The convergence analysis of the first eight natural frequencies (Hz) of the quadrangular prism acoustic cavity.

Mediums	M × N × L	Model sequence
		1	2	3	4	5	6	7	8
Air	4 × 4 × 4	208.17	235.92	340.00	344.78	396.33	398.67	413.83	464.79
	5 × 5 × 5	208.17	236.07	340.00	341.78	396.33	398.66	413.83	464.78
	6 × 6 × 6	208.17	235.92	340.00	344.78	396.33	398.66	413.83	464.77
	7 × 7 × 7	208.17	235.92	340.00	344.78	396.33	398.66	413.83	464.77
	8 × 8 × 8	208.17	235.92	340.00	344.78	396.33	398.66	413.83	464.77
	FEM	208.17	235.87	339.94	344.76	396.17	398.54	413.67	464.61
Water	4 × 4 × 4	906.15	1026.98	1480.00	1500.81	1725.21	1735.37	1801.39	2023.21
	5 × 5 × 5	906.14	1026.95	1480.00	1500.81	1725.21	1735.36	1801.39	2023.14
	6 × 6 × 6	906.14	1026.94	1480.00	1500.80	1725.20	1735.36	1801.39	2023.13
	7 × 7 × 7	906.14	1026.94	1480.00	1500.80	1725.20	1735.36	1801.39	2023.13
	8 × 8 × 8	906.14	1026.94	1480.00	1500.80	1725.20	1735.36	1801.39	2023.12
	FEM	906.06	1026.90	1479.80	1500.50	1724.60	1734.80	1800.80	2022.50