I've noticed that when I turn my headphones on (on highest noise cancellation setting, without music), I hear a soft high beep only at the left side. This beep isn't continuous, it has a pattern; 6 sec beep, 1 sec nothing, 6 sec beep, 1 sec nothing etc.. This lasts about 1 minute.
It doesn't matter if the headphones is paired or not.
Is this common? Or am I the only one with this?
Welcome to the community, thanks for reaching out. I am sorry to hear that you are experiencing some beeping from your left audio channel. I can confirm that this is not a normal procedure for the QC35 II headphones so I would like to look into this with you.
I would firstly suggest performing a reset of your headphones. Instruction on how to do this can be found below.
Following this, check for any available firmware updates for your headphones. This can be done via a computer using a USB and visiting our firmware update website btu.bose.com, which will provide you with full instructions.
Do let us know if this shows any sign of improvements.
Tegan M - Community Support