Noise Reduction with IIR Butterworth Filter

Version 1.0.1 (1.82 KB) by Pang Kah Hoe
To demonstrate the IIR Butterworth Filter
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Updated 21 Apr 2020

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The desired frequency is 1kHz and 1.7kHz.
It is added with White Gaussian Noise.
The noisy Signal is being filtered with Bandpass, and then Bandstop.
Both of the Filters and design with Butterworth 2nd order, it be better by increasing the order.
Feel free to experiment it, you may also insert your own signals.

Cite As

Pang Kah Hoe (2026). Noise Reduction with IIR Butterworth Filter (https://nl.mathworks.com/matlabcentral/fileexchange/75135-noise-reduction-with-iir-butterworth-filter), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2019b
Compatible with any release
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1.0.1

changed name
1.0.0