Open Access

Table 1

Geometrical dimensions of three resonators with the same first impedance peak f 1 and different cutoff frequencies f c. First peak and cutoff frequencies in Hz, all other quantities in mm. The first hole is located at . Consider for the cylinder.

f 1 f c L h a b
185 1000 398.8 9.8 6.5 2.5 16.3
185 1500 417.0 9.8 6.5 4.0 16.3
185 2000 426.0 9.8 6.5 5.8 16.3
185 450.0 6.5 0.0

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