I have a couple of datasets that show a peak around the 50-60 Hz range (mostly around 55Hz and in some cases at their harmonics i.e. 100-120Hz.) In some datasets the spike is significant in comparison with other frequencies.
Before I analyse the data, I need to ensure that these spikes are not interfering with my analysis.
I was wondering what filters would be suitable especially at a larger frequency bandwidth/range (50-60 Hz.)