File Exchange

image thumbnail

Vuvuzela filtering with parametric equalizers using System objects

version (1.16 MB) by

This example filters out vuvuzela sounds from an audio stream using parametric equalizer filters.



View License

This soccer season, denoising the noise from the vuvuzela has become very popular, as many fans find the noise from this instrument distracting from the game. In this example, we analyze the vuvuzela spectrum and identify its fundamental and first few harmonic frequencies. We then use parametric equalizers to selectively filter out these frequencies.
Notch parametric equalizers are used to remove the vuvuzela frequencies. As the notch filters may also remove components of the speech signal at the vuvuzela frequencies, a peak parametric equalizer is used to boost the speech signal at the output of the notch filters.

Stream processing techniques are used to process the input audio in "frames", and the filtering is done in a stream processing loop as well. Output audio is stored as a WAV file, and also logged to the MATLAB workspace, where the output results can be analyzed further.

Comments and Ratings (2)

jing zhang

Tanyer Alan

Tanyer Alan (view profile)


Updated license


Minor code changes


Added copyright

MATLAB Release
MATLAB 7.10 (R2010a)

Inspired by: Vuvuzela sound denoising algorithm

Download apps, toolboxes, and other File Exchange content using Add-On Explorer in MATLAB.

» Watch video