I can't say anything about this ear plug. However, I will relate how I handled uncomfortable overtones immediately after the onset of tinnitus. I simply roll two small pieces of cotton and place them in each ear. I find that volume is almost unaffected as I can still easily converse with people. However, those tones that I find disturbing no longer bother me, and I guess, not heard.
'Violin' 11 hrs
'I'll Fly Away' 22 hrs
'Smooth Fiddlers?' 2 days
'Pietro Bellini Violin 2006' 3 days