I’ve seen this work tolerably well in an open space that’s entirely engineers or similar roles, assuming there are enough conference rooms for people to peel off to for meetings and calls, and you can establish the culture of the main room having a library-esque hush.
As soon as people start having multi party conversations in the main space because the conference rooms are booked 100% of the time, or people whose jobs involve talking all day are seated there, it’s game over. Noise cancelling headphones are no match for the 25th “Hey Bob, this is Jason at Intertrode, do you have 5 minutes?” of the day.
Active noise cancellation is said to be improving, but it’s hard to go wrong with a big hunk of plastic if you can find a comfortable pair of closed-back circumaural phones. I’ve gone through about three pairs of HD 280. A former colleague would wear the same ear pro he uses at the gun range.
As soon as people start having multi party conversations in the main space because the conference rooms are booked 100% of the time, or people whose jobs involve talking all day are seated there, it’s game over. Noise cancelling headphones are no match for the 25th “Hey Bob, this is Jason at Intertrode, do you have 5 minutes?” of the day.