Research Article
Active Suppression of Narrowband Noise by Multiple Secondary Sources
Figure 4
Real-time narrowband control results without the quality factor. ((a), (b), (c)) Spectrograms after control when LS1 only, LS2 only, and LS1 + LS2 are operated, respectively. ((d), (e), (f)) Comparison of error spectra between “before control” and “after control.” ((g), (h), (i)) Comparison of attenuations.
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