Many people also find the physical feeling of anything covering / touching / inside their ear to be too uncomfortable to focus, ruling out all possibilities of headphones, earbuds or earplugs from consideration. And even more, lots of people have sensitivity to music that distracts them or makes them feel tired very quickly. And in severe enough cases, someone can have full-blown misophonia, and truly need the ability to completely customize their workspace in order to totally control all sounds during periods when they need to focus.
I know your advice might help some people, but I really wish there was a way en masse that developers could communicate that headphones absolutely do not solve the problems created by open-plan office layouts (one of the main destroyers of focus). It's sad that as a collection of workers, we've allowed ourselves to be put into this position by not demanding private offices and turning down jobs that won't provide such a cost-effective tool.
This would benefit everyone as open plans destroy productivity. The "free market" (oligopoly) has obviously failed here so the state needs to step in.
I think creating a specification that office workers must be given a certain measurable protection against general workplace noise and a certain minimum of private floorspace in which to work, would be quite reasonable.
I wonder if a change.org petition or something would be worthwhile.
My current setup involves in-ear monitors (Massdrop x MEE Audio Pinnacle PX IEM) plus gigantic 3M Peltor X5A earmuffs on top of them [1].
I look ridiculous wearing the 3M Peltor X5A but it sends a strong message that I don't want to be disturbed, and they do a much better job than the Bose headphones at blocking human voices.
I have read that an alternative is to wear headphones on top of in-ear monitors, playing music on the IEMs and white noise on the headphones. This is the setup for Starcraft II professional gamers in tournament settings, for example.
[1] pic: https://pics.dllu.net/file/dllu-pics/20180716_151629.jpg
What? My earphones are $15. What do $120 headphones do to deserve being 8 times more expensive?
until you try them, you wouldn't understand.
and yes, that is cheap considering that NC headphones typically go for $299 and up
Though keep in mind that they remove noise, so things like fans are going to be gone, but they aren't made to shut everything out.