speaker problem

I am facing a speaker problem with my hp pavilion 15 ec0000nx , I hear a strange and vibrating noise when the frequency of the tune played get high , I think this vibrational / rattling / crackling noise is coming from the right speaker more than the left one and it became more noticeable when raising the volume to more than 60. also I checked another pavilion 15 ec0000nx in the local store and found the same issue there . I checked my audio driver if theres any updates and turned out that its already updated also I tried the hp diagnostic system and windows troubleshouter but nothing solved the problem . I faced this problem from the day one using the laptop.
can anyone please help