There are a lot of ways to get rid it for good, but most of them make use of the Xposed framework, and consequently require a rooted phone. This might sound a bit fussy, but for daily passengers, runners and cyclists, it can be nothing short of a nuisance. The warning stays put until you take out your device, unlock it, and then disable the notification. It doesn’t think about how noisy your surroundings are, or how badly sound leaks from your headphones (take those stiff plastic lumps that came bundled with your smartphone, for instance). But for many of us, it is more of unnecessary evil.
Okay, we all know that the safe volume warning is there for a good reason: to prevent us from going deaf in the long run.