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

Table 1

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

Mediums	M × N × L	Model sequence
		1	2	3	4	5	6	7	8
Air	4 × 4 × 4	192.21	235.78	340.00	356.05	390.57	413.11	413.75	462.42
	5 × 5 × 5	192.21	235.78	340.00	356.04	390.57	413.09	413.75	462.40
	6 × 6 × 6	192.21	235.78	340.00	356.04	390.57	413.08	413.75	462.38
	7 × 7 × 7	192.21	235.78	340.00	356.04	390.57	413.08	413.75	462.38
	8 × 8 × 8	192.21	235.78	340.00	356.04	390.57	413.07	413.75	462.38
	FEM	192.20	235.76	339.94	355.98	390.46	412.97	413.62	462.27
Water	4 × 4 × 4	836.70	1026.33	1480.00	1549.85	1700.14	1798.24	1801.04	2012.91
	5 × 5 × 5	836.69	1026.32	1480.00	1549.84	1700.13	1798.15	1801.04	2012.79
	6 × 6 × 6	836.69	1026.32	1480.00	1549.83	1700.13	1798.11	1801.03	2012.73
	7 × 7 × 7	836.68	1026.31	1480.00	1549.83	1700.13	1798.12	1801.03	2012.71
	8 × 8 × 8	836.68	1026.32	1480.00	1549.83	1700.13	1798.09	1801.03	2012.71
	FEM	836.64	1026.20	1479.80	1549.60	1699.70	1797.60	1800.50	2012.20