Terrible Buzzing in background

There is a terrible buzzing in the back of the .wav file I am working on. Can you please tell me which effect I need to use to get rid of it??? Thank You! :slight_smile:

Lets take a guess - Noise Removal?

Does it start about five minutes into a track? If so, NR won’t do anything to help.

Have done spectrum analysis on roughly same vocal refrain before and after noise starts. Can’t include Excel spreadsheet because forum wont accept file extensions. Noise starts at about 2kHz (~2dB) and increases thru higher frequencies until it hits a high of 36dB at 22kHz. It is linear from 1kHz upward.