Bose product name; A20; headset about 1 years old; fitted new BT cord 2 yrs ago; U-174 helicopter connector
Detailed description of the issue and steps to reproduce: When rapidly descending (1,000 FT/min +) I hear a very lead high pitched feedback noise in the RH ear only, like passing a microphone in front of a speaker. It is so loud and painful that I have to momentarily remove the headset from that ear. The feedback lasts for 5 to 15 sec, but not longer than the descent itself.
What environment do you experience the issue in? (e.g. noisy office, quiet kitchen, etc.): R44 piston engined helicopter (non-pressurized cockpit)
When did you start to experience the issue? Did it work correctly previously? 1 yr ago. Yes, worked fine previously with old non-BT cable, and also with new BT cable
Any troubleshooting steps you took:
- Swopped with old non-BT cable: same
- Replaced ear gel cups 6 month ago: same
- Had headset serviced by local Bose-authorised dealer: First round no improvement; second round they found a "cold soldering" on the opposite side ear muff (LH). Initially it seemed better for a week, but then problem reoccured