Table 2: Minimum sound power obtained using of ESO and GA (dB).

Rejection ratioESOGA
First BCSecond BCFirst BCSecond BC

25%96.51 dB99.71 dB96.12 dB97.18 dB
50%96.67 dB98.61 dB96.51 dB96.37 dB
75%99.21 dB98.00 dB98.91 dB98.00 dB