They have to be loud enough to be heard through hearing protection. The amplitude is a feature.
It's a "solved problem" in the sense that nuclear energy is a solved problem. There's no mandate to actually see widespread roll out of anything that may be a better solution.
There's a construction site near me at present. There is always 1 machine in reverse, at all times. The utility of having a backup beeper or any noise making device on that site is thus zero. It is the single largest source of noise pollution, larger than the roadway
It's a "solved problem" in the sense that nuclear energy is a solved problem. There's no mandate to actually see widespread roll out of anything that may be a better solution.
There's a construction site near me at present. There is always 1 machine in reverse, at all times. The utility of having a backup beeper or any noise making device on that site is thus zero. It is the single largest source of noise pollution, larger than the roadway