QC 25 squealing noise
On my Bose QC 25, a high-pitched intermittent squealing noise in the right headphone. It's hardly Quiet Comfort!! It is so loud and piercing it makes the headphones impossible to use unless I remove the batter (which removes the noise cancelling function of course). It only starts when I put the right headphone over my ear. However, I can also get it to make the noise when I remove the pad on the right side, and simply place my hand, or even just one finger, across the headphone without touching the perforated cover inside. It sounds to me just like a feedback squeal. I see similar problems reported for the QC 35, and the 700. Any suggestions about what's to be done. Because of the current Covid-19 crisis, Bose seems to have shut down its phone support here in Australia, and there's no online support either.