Hi,

I just came across this subreddit, but I'm not sure if this is the right place for this kind of question, so I apologize in advance.

I'm doing research on Event-Related Potentials (ERPs), more specifically, the N1 and P2 components elicited by auditory stimuli. After obtaining the ERPs, one of the pre-processing steps is low-pass filtering, which I did at 15Hz based on the literature for these waves.

I'm about to publish my first paper at a small conference based on this research which has already been accepted. However, one of the reviewers asked why the need to use a filter and why specifically 15Hz.

I've been searching on the internet for papers on the issue, but I honestly can't find an objective answer. Because it is used in every paper I ever read on ERPs, I always assumed it was to better define the peaks. However, I never came across an actual explanation to why. Does anyone know the answer or a paper that I can read to understand this issue?