A Control Source Structure of Single Loudspeaker and Rear Sound Interference for Inexpensive Active Noise Control

Table 2

Mean square value of error mic. signal <

	Mean square value 𝑧(𝑡).
	case (a)	case (b)	case (c)
Without cont. (1)	0.00598	0.00575	0.00431
With control (2)	0.00322	0.00166	0.00229
Reduction (1)-(2)	0.00276	0.00409	0.00203