I got some Sennheiser gaming headphones that were supposed to have noise cancellation, but I'm not happy with them. I can still hear outside noise enough that i

I got some Sennheiser gaming headphones that were supposed to have noise cancellation, but I'm not happy with them. I can still hear outside noise enough that it makes me think they're not working. Buddy showed me his Parrot Zik headphones, and they were pretty good. I'm open to suggestions if anyone has any. I want to be able to have clear sound for conference calls, as well as excellent noise cancellation.