WHAT?
can't hear you? i've been listening to music my whole life with headphones, and i'm obviously deaf now!
No, this is ludicrous. I recommend you study a little befor making a comment.
The closeness of the audio has very littyle to do with how it affects your hearing. The Volume on the other hand is more important. You can do significant damage to your ears from meters away if the volume is loud enough to do damage. Meanwhile, if you've got headphones in one really low volume, you're not likely to cause any damage.
Damage caused by noise to the ear tends manifest from the cilia in the ear. These cilia "wave" in response to the sound wave as it passes through the inner-ear. If the volume is too loud, these tiny hairs can be bent back for temporary hearing loss (ringing or numbness of sound), and if it happens too frequently and too strong, they can break, and lead to more permanent hearing loss.
Technically it's not the volume. It's the decibels.
You can have something you can barely hear still damage your hearing.
For example, an old buddy of mine was big into bass music. Rap.
He used to build big stereos with huge speakers and try to show off his bass levels.
So one day I challenged him to a deafening bass competition. His $500 stereo against what I could build with $15.
I took a simple car radio (this was the 80's). A small eq booster. And a small preamp graphic equalizer.
I hooked up two old style 8 ohm 6x9 speakers. Adjusted my eq and eq booster. And turned on the radio.
We couldn't hear anything. But we could feel the bass in our ears. The pressure was painful. The pain throbbed to the beat of the music. But we couldn't hear the music. It was too quiet.
20 feet away from the car, it still hurt.
There was no audible sound. Just the painful pulsating of the deep low bass.
So, I won. Lol
I showed him what could be done for much less money, with barely any power (30 watts total) and very small speakers.
His big old woofers and 1000 watt amp came up short.
After that, I helped him retune his stereo to get some deep bass. I returned my stereo back to a pleasant listening environment. And he never put me down for my cheap stereo again. Lol.