If regular noise canceling headphones are good enough while waiting on latency, they are probably good enough after that for three or more sigmas of people who

If regular noise canceling headphones are good enough while waiting on latency, they are probably good enough after that for three or more sigmas of people who use noise canceling headphones for coffee shop music. People who noise cancel coffee shop music are only a minority fraction of coffee shop patrons. And people spend only a small fraction of their lives in coffee shops. Anyway building it is the simplest way to learn how to build it and the way to get what you want or understand its practicality or impracticality. Paying someone else to develop it is a possibility but typically naught but a logical one I’ve included for completeness. For reference, I was gifted some AirPod pros and they handle the coffee shop reasonably well provided I have music or similar playing in them. When I want just silence, I use cheap earplugs.