Write the next sentence in this paragraph:

How to filter the vuvuzela noise
Locate the equalizer.
Either use equalizer on your stereo if you're using that to listen with, or the one on your tv, if it has one. If needed, read the manual accompanying the stereo or tv for instructions on how to adjust the equalizer settings.
Adjust the hardware settings of your equalizer. It is recommended to turn the frequency down as low as your equipment can go; try lowering sound level of the frequencies 235 hz and 465 hz with about 40 decibels.