For reference, recently updated to a Bose QC 45 after my older 25s started randomly dropping connection all the time.
It is an atrocious UX. It cannot be disabled via the paired mobile app. Do not buy these headphones!
I don't necessarily think it has a negative affect on my hearing, but I feel in general that it brings down my outward awareness as a whole. It's a very isolating experience, being in noise-canceling, and I think normalizing being in that zone conditions my mind to become very insular and broadly ignorant of my surroundings. As I start wearing them less, this noticeably diminishes.
And speaking specifically to my personal situation, I feel it directly aggravates my anxiety through this mechanism.
Bose QC are specifically targeted at air travel where you can noise cancel the airplane noise but still talk to the stewardess or your neighbor. I found a no-name brand of noise canceling headphones off Amazon a much better solution because they had better ear pads that isolated sound while their worse noise canceling didn't give you the same "pressure" feeling that the Bose headphones give you. And they dulled the voice chatter more effectively. It seems like if voice chatter doesn't have the high frequency component it is easier for me to ignore it. I think it's also why I find it next to impossible to pay attention to someone dialed into an online meeting.
Eventually circumstances allowed me to buy nicer homes with dedicated office space and I find I don't use noise canceling devices any longer. My current home is an executive-style-home-on-the-cheap and has noise isolating insulation in interior walls which really helps.
What is strange is that the emotion present in the voice chatter around me is a huge factor. My son can be gaming in the office with me and talking with his friends and I have no problem with focus. If he gets frustrated or too hyped up, I have no hope of concentrating and I have to kick him out of the room. We have since worked out an agreement and he doesn't play LoL or Destiny while I am working, the two games that cause anger management issues for him. :)
They're near magical at cutting down the rumble of ventilation systems, airplane wind noise, and even bus engines. But spoken voice contains high-pitch elements that they just can't track and so you still hear it. Though attenuated, it's at about the same ratio to the attenuated background noise.
For me, personally, this means I generally don't use them as just noise cancellation devices. I'd rather have the whole sound spectrum than "cone of silence" with voices still cutting through. I find playing some music, even at a low level, solves that, but I concentrate better with random background burble than with music.
Mine are QC35s. I also have a cheap pair that cost about 1/8 as much that doesn't have quite the "whoa" effect of the Bose ones, but still very satisfyingly cuts down diesel engine roar in the rear seating row of a bus!
I generally use them to lower the volume I can play the actual environmental-noise blocking audio, which is normally a combination (ie at the same time) of white noise (specifically RainyMood) and whatever rythmic soundtrack will help me stay in flow.
I mean by that I don't use them alone, but they enable me to play stuff for extended periods so the risk to my hearing is considerably lower than playing it without noise cancelling.
i also have some model of these Jabra call center-type headphones with the slide down/out microphone boom. They don't have active noise cancellation, i don't think?, but they're pretty good at just keeping out outside noise. if i have anything do with it, everyone on my calls/zooms must use a headset and microphone -- i don't want garbage echoing and reverberating and people missing things just because someone is too lazy to get a quality audio setup. ditto podcasts -- 'professional' podcasts and i hear the main show host's voice echoing off his own walls? f** is wrong with you? for my coworkers, we're remote, great, but take this shit seriously, at least on my time. :) these particular Jabras i have are too tight on my ears - i need to see if i can make them clamp with a bit less force.
https://www.jabra.com/business/office-headsets/jabra-evolve/...
getting true hearing-protecting headphones of some type so that i can walk/jog/be on the street without cranking the volume up to eleventy would be so legit. there's a ton of noise, but if we got rid of just car tire noise, we'd probably be good.
While the Bose 700’s integrated non-user-replaceable battery is one annoyance everyone is moving to, you also can’t use the headphones at all while charging. Not even in plugged-in analog mode without noise cancellation.
It’s a brick while charging.
I also feel like the ear-pad covers have poorer durability than previous generations. I’m a bit rough with them (e.g. throw in backpack, I never use the case).
My Bose QC's made me nauseous when I started using them. I acclimatized to a degree but only ever use them in flights. And they "sound" weird compared to eg. covering my ears with my palms.
Also tried AirPods Pro and didn't like the feature (or the amount they stick into your ears); swapped for the cheaper / older model which I love.
An especially good combo on noisy flights, etc.