> I stress to my patients and the parents of my patients that if you can’t hear anything going on around you when listening to headphones, the decibel level is too high.
This is just stupid. It ignores type of headphone entirely. IEMs like the ER-4P (https://www.etymotic.com/consumer/earphones/er4.html) have insane noise isolation (up to 42 dB). When using them, I can't hear someone talking to me, standing right next to me, with no music! They physical block the ear canal and create a seal blocking outside noise.
> As a rule of thumb, you should only use [personal audio] devices at levels up to 60% of maximum volume for a total of 60 minutes a day. The louder the volume, the shorter your duration should be. At maximum volume, you should listen for only about five minutes a day.
Again, idiotic. "60%" is entirely meaningless. It might as well be "Don't listen above FALASFDABURAGA". Headphones vary in sensitivity vastly, on some sets of IEMs -- 60% would be ear bleeding, deafeningly, painfully loud. On a high impedance, low sensitivity set of big headphones, 60% is a whisper. As a "rule of thumb" all it does is reinforce that the person who gave that quote is an idiot.
> If you listen to music with earbuds or headphones at levels that block out normal discourse, you are in effect dealing lethal blows to the hair cells in your ears.
... again, quotes from people who have no understanding that there are different types of headphones. MAYBE you could claim with fully open headphones this to be the case... but what is the level of "discourse"... sigh. Again, literally nonsense because it is impossible to make sense of...
> ... Music Is Distracting (entire section) ...
There exists multiple categories of music WITHOUT WORDS! Shocking I know. Most developers I know listen to these types of music because, lyrics are distracting. That isn't a cut against headphones.
> ... Feeling of Vulnerability ...
Getting to some sad points. Again, I hate open office plans, but come on -- really -- the feeling of vulnerability being caused by headphones? It is caused by an open office layout.