I can guarantee that even top of the line noise cancelling headphones do not obscure a conversation happening next to me. The only way to drown out enough noise

I can guarantee that even top of the line noise cancelling headphones do not obscure a conversation happening next to me. The only way to drown out enough noise is to raise the volume to an uncomfortable-to-me level. If you are lucky enough that you can be in comfort and noise-isolated from earbuds or headphones, I envy you.