In regards to no noise canceling, when you have the music on, yes it cancels a decent amount of outside noise out. When there's no music (in between tracks, paused, etc) it's like there's nothing in your ears.
Bass: very little bass, although I'm used to my Sennheiser HD280 over the ear headphones. However, in my opinion, it's a decent amount of bass for earbuds.
It does, however, seem to muffle the audio, so I have to set my EQ on my iPhone/iPod to R&B and turn up the volume and it suddenly sounds a MILLION times better!!I would recommend this item to a friend!
I currently own a set of the Bose IE2 headphones which, while nice sounding, do not cut out any ambient noise. This is problematic for me because I have to use them when playing in my church's band as they don't use any stage monitors.
I came across the NewerTech earbuds and for the price (since they're currently on sale) I figured "What the heck. I'll give them a go." The specs on these earphones state that these earbuds should reduce ambient noise up to 42db (which is a ton).
The problem is that they don't fit my ears at all. This may not be a problem if they provided other tips. The included tip just simply doesn't go deep enough into the ear canal to provide the proper seal.
If I happen to find other tips that work I may change my review, but until then be aware of this limitation.