Active Suppression of Narrowband Noise by Multiple Secondary Sources

Table 1

Average attenuation in dB of the error signals without/with the quality factor.

	LS1 only (dB)	LS2 only (dB)	LS1 + LS2 (dB)
C1 ()	5.28	5.97	—
C1.5 ()	1.40	1.22	—
C2 ()	6.03	5.82	—
C1, C1.5, C2 (); Control off	0.00	0.00	0.00
C1, C1.5, C2 (); Quality control on	—	—	5.84
C1, C1.5, C2 (); Quality control on	—	—	13.71
C1, C1.5, C2 (); Control on (full)	25.62	24.09	29.74