Funny that something similar swore me off another brand’s headphones. The noise cancelling would amplify mechanical vibrations of the headphones, so much so that even eating with them on would cause a deafening bass. Walking with them on was also incredibly loud.

I sent them to support with a very good description of the problem, came back the same, “cannot reproduce”.

It seems support workers for both companies just connect them to an audio source and check if sound comes out relatively alright.

Prior to the third time going to Genius Bar, I was able to reach a senior manager for Apple repairs in a phone call to Apple Support. And even after asking him to take down a note on my incident to have the repair tech physically open the right ear can, they still came back with "cannot reproduce". There was either a screw loose in my brain or the headphones. Guess we'll never know which.