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

Table 3

The first eight natural frequencies (Hz) of triangular prism acoustic cavities with different shapes.

Mediums	Shapes	Model sequence
		1	2	3	4	5	6	7	8
Air	Isosceles	192.21	235.78	340.00	356.04	390.57	413.07	413.75	462.38
		192.21^a	235.78	340.00	356.05	390.57	413.11	413.75	462.42
	Equilateral	226.67	226.67	340.00	392.60	408.63	408.63	453.33	453.33
		226.65^a	226.65	339.94	392.50	408.50	408.50	453.21	453.21
	Right angle	99.54	178.88	212.49	266.47	318.68	340.00	353.16	354.27
		99.54^a	178.87	212.47	266.46	318.64	339.64	353.14	354.20
	Obtuse angle	89.70	156.70	211.57	272.20	322.27	340.00	340.99	351.63
		89.70^a	156.71	211.70	272.70	322.17	339.52	341.94	351.01
	Acute angle	106.15	194.28	207.14	281.53	328.05	340.00	356.19	366.87
		106.15^a	194.28	207.13	281.51	328.01	339.94	356.11	366.82
Water	Isosceles	836.68	1026.32	1480.00	1549.83	1700.13	1798.09	1801.03	2012.71
		836.64^a	1026.20	1479.80	1549.60	1699.70	1797.60	1800.50	2012.20
	Equilateral	986.67	986.67	1480.00	1708.96	1778.74	1778.74	1973.34	1973.34
		986.61^a	986.61	1479.80	1708.50	1778.20	1778.20	1972.80	1972.80
	Right angle	433.30	778.64	924.94	1159.94	1387.20	1480.00	1537.29	1542.13
		433.30^a	778.61	924.89	1159.90	1387.00	1479.80	1537.20	1541.80
	Obtuse angle	390.47	682.10	920.94	1184.87	1402.84	1480.00	1484.31	1530.64
		390.46^a	682.12	921.12	1185.50	1402.70	1479.40	1485.30	1529.90
	Acute angle	462.08	845.71	901.66	1225.49	1427.98	1480.00	1550.46	1596.96
		462.08^a	845.67	901.61	1225.40	1427.80	1479.80	1550.10	1596.80

^aResults from finite element software ABAQUS.