As a consultant had to work in some insane open office environments, including ones where the sales people are on the phone constantly, well within earshot of t

As a consultant had to work in some insane open office environments, including ones where the sales people are on the phone constantly, well within earshot of the engineering team. I used in ear monitors with aftermarket foam tips. Very effective. I also had the experience of a client CEO, and the director reports, standing behind me, and one more junior person tasked with waving their hand in front of my face to get my attention.