Adaptive Cancellation Method of Ambient Noise in Corona Audible Signals based on Delayed Signals

Spectral subtraction and low-pass filtering, which are commonly used to eliminate the ambient noise mixed in corona audible signals, will damage the spectrum of corona audible signals. In order to reduce the damage to the corona audible signal spectrum caused by the noise canceling process, firstly,...

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Bibliographic Details
Main Authors: Guo, Hou Xin, Duo, Zhang, Xuan, Tu
Format: Conference Proceeding
Language:English
Subjects:
Adaptive Noise Canceller
Ambient Noise
Corona
Corona Audible signal
Denoising
Harmonic analysis
Low-pass filters
Noise cancellation
Power harmonic filters
Wavelet transforms
Working environment noise
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Summary:Spectral subtraction and low-pass filtering, which are commonly used to eliminate the ambient noise mixed in corona audible signals, will damage the spectrum of corona audible signals. In order to reduce the damage to the corona audible signal spectrum caused by the noise canceling process, firstly, this paper defines three evaluation indexes of noise elimination effect according to the difference between the audible signal of corona and the environmental noise at 20 ~ 20KHz. Then, use the low-pass filter to pre-process the signal to eliminate the harmonic components in the ambient noise. Finally, the delay signal is selected as a reference signal to adaptively eliminate the ambient noise Simulation and experimental results show that this method can effectively eliminate the ambient noise in the corona audible signal.
ISSN:2689-6621
DOI:10.1109/IAEAC50856.2021.9390703