1) A decibel measuring app that tracks how much noise you’re exposed to. Like a fitness tracker, but a sanity tracker. Once you hit a threshold of unacceptable daily noise exposure, it notifies you, as a reminder to escape somewhere quiet.
2) An interactive map of city quiet zones. Using the noise tracker above, it maps the quietest and noisier areas in your city.
3) Nap Pods. I said it before, I’ll say it again, heavy business districts need nap pod stations, set up similar to massage parlor rooms. They could be operated 24 hours, doubling as a hotel overnight.
4) Sell noise canceling headphones to corporations so that they can lend/rent to employees.
5) Create an interactive game where people can hunt for secret zen monasteries. They’re always on the move in the city. And only the first person to find the hidden key gets exclusive access to them for a week. Each is beautifully decorated and stylishly minimalist. The hunt for zen!