- TVs blaring in waiting rooms when you'd prefer to just sit in silence.
- Appliances and gadgets that make unnecessary beeps; my coffee maker makes some irritating chirps when the coffee is ready and a particularly unwanted second set of chirps 2 hours later to tell you that it's turning off.
- Trucks that make a shrill beep-beep-beep when they go in reverse. Think about snow clearing trucks at 3am if you live some place that's difficult to clear.
- Useless announcements and even ads on subways, buses, and flights; who needs instructions on how to attach your seatbelt on a flight (ridiculously sometimes given after takeoff).
- Autoplaying audio on websites. Fortunately, we've made progress on this one with browsers settings.
- Monthly fire alarm testing in some condos and office buildings. Surely, some way could be devised to test the system without disturbing thousands of people at once.
It's tragedy of the commons where the commons is the air space.