File:Notch 50Hz audio filter.svg
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Summary[edit]
DescriptionNotch 50Hz audio filter.svg |
the frequency response of a digital filter to remove the 50Hz mains hum. I created it with the following Matlab code: N=20000; %resolution
fmax=20000; %max frequency of audible sound [Hz]
[num,den] = iirnotch(50/fmax,10/fmax);
[H,F]=freqz(num,den,N,2*fmax);
H=20*log10(abs(H));
semilogx(F,H,'LineWidth',2);
axis([10 fmax -20 5]);
xlabel('frequency [Hz]');
ylabel('amplitude [dB]');
grid on;
|
Date | |
Source | Own work |
Author | Alessio Damato |
Licensing[edit]
I, the copyright holder of this work, hereby publish it under the following licenses:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:26, 4 November 2007 | 461 × 346 (166 KB) | Alejo2083 (talk | contribs) | {{Information |Description=the frequency response of a digital filter to remove the 50Hz mains hum. I created it with the following Matlab code: <source lang="Matlab"> N=20000; %resolution fmax=20000; %max frequency of audible sound [ |
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