Figure 8. Variable-frequency acoustic pressure at position A (b1); position B (c1); and position C (d1) and fixed-frequency acoustic pressure at position A (b2); position B (c2); and position C (d2). (a) Boundary conditions.

Figure 8. Variable-frequency acoustic pressure at position A (b1); position B (c1); and position C
(d1) and fixed-frequency acoustic pressure at position A (b2); position B (c2); and position C (d2).
(a) Boundary conditions.