This is especially true, for me at least, when I am conducting induction talks for others. They are all the daily sounds that constitute the cacophony of modern urban civilization. But saying that doesn't make them any less disruptive. If you live in a city you know what I mean. Trucks so noisy you could trace them all the way across town with a seismograph.
Most people today live in cities and towns, but farm life can be noisy, too.
No matter where you happen to it is likely that there are lots of common but potentially disruptive sounds. Most people complain about these noises when they were trying to practice self-hypnosis. It was clear that what was needed was a masking noise. I thought it would be a simple matter to record the white noise which would mask background noises and settle the problem. Unfortunately we don't live on that kind of a planet.