Not exactly to the question, but for reference in an office environment (where the noise is more intermittent): several years ago my Bose headphones weren't hel

Not exactly to the question, but for reference in an office environment (where the noise is more intermittent): several years ago my Bose headphones weren't helping me for that, and I found the best combo for me was industrial earmuffs (like 3M, blocking maybe 30 decibels), combined with foam (or noise-blocking) ear buds placed underneath, and a white noise or similar app (like chroma doze off the f-droid.org app store). If there is better general noise blocking for offices, I'd like to know.