Noise Cancelling 700 vibration noise on one ear
I am a happy user of my headphones except this issue:
I'm taking meetings with my headphones. In most of these, I am hearing a vibration noise from the right ear cup when somebody talks. The noise is not consistently there but it is frequent, and happens especially when I talk.
When listening to music (i.e., when the mic is turned off), I have not noticed the same vibration-like noise.
Also, when I shake my head or walk around, I can hear something inside the right ear cup making a tingling sound. This, and the fact that the left cup is perfect, makes me think that something might be loose and the problems pertains to hardware.
Could you please help me out?