The audio is great and they do a decent job of noise cancellation.

They do a good job of keeping out external sounds, but possibly not quite as well as I had

I've never owned an active noise cancelling set (e.g. Bose Quietcomfort) for comparison, but based on my research I understand they do a pretty good job with low level, uniform noise

There is no need for noise cancellation features, these do such a fine job of blocking out the world with awesome fidelity

I would use these at my noisy office job to help me focus, and worked like a charm.

They do a decent job at isolation as well

The music is crystal clear and the full ear covering does an excellent job of blocking outside noise.

and I feel these do a great job of that.

Sennheiser has done a fantastic job with these headphones and I plan to stick with them for a long time

The sealed design does a good job of blocking outside noise as well as not disturbing those around you when listening at higher volumes

Though the around the ear design does it's job pretty well

They are fairly neutral and do a good job with the highs, lows, and mids.

They do a much better job of isolating sounds and making it easy for me to concentrate.

Love then, use then at work only do a wonderful job of just knocking the edge off back ground noise and a nice freq response

Great job Senheiser!

Also, the ear caps do a fair job of keeping outside noise out, but if you are in a noisy environment and really want to keep the outside sound out, and the inside sound in go with something like the Shure SE215-K which is actually noise isolating

Still, the Shure's did a satisfactory job

The zippered case is a nice touch and it does a great job protecting the contents

That said, they do a good job of keeping external sounds out.

This is great quality headphones, which do good job delivering non-impacted sound

They do an excellent job of isolating sounds so your listening is not interrupted

In-the-ear-canal type earbuds do a better job

In my quest to search for the best closed, non-noise-cancelling headphones that will do a satisfactory job of isolating the engine rumble of the bus that I take to and from work, I found that the choices are very few.

There's no active cancellation, but as far as isolation, yes, they do a good job of separating the outside world and your sound stage, as it were

They do a remarkably good job of blocking outside noise and not allowing the sound to escape either

Sennheiser has definitely done a great job.

The ear cups while not active noise cancelling do a great job of blocking out external noise in an airplane to enjoy whatever content you're trying to listen to

But for my classic R&B and soul tracks they are perfect