I just bought a pair of Bose 700 headphones. It's my first pair of over-ear headphones and so far I love them. However, though the noise cancellation is excellent for me, I find that the headphones leak a lot of music to the outside, meaning that anyone sitting around me would be able to hear my music. Since I will be using these a lot for travel, remote work, and exercise purposes, I was hoping there would be more noise cancellation to outsiders. I don't want people around me to hear my music and I also don't want to disturb other people around me. Is there any way that I could prevent the sound from my headphones from leaking to the outside?