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da_silva
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Aug 2, 2021

A20 High Pitch Squeal During Phone Calls on EC135 Aircraft

Bose product name - A20

 

Country - Canada

 

Firmware Version

 

App Version

 

What devices were you using that were affected and what version are they on - IPhone XR Software 14.7.1

Detailed description of the issue and steps to reproduce - When sending and receiving phone calls headset emits a high pitch squeal during the call. Can faintly hear the caller through the squeal but the high pitched squeal renders the phone call unreadable.

 

What environment do you experience the issue in? (e.g. noisy office, quiet kitchen, etc.) Ground Runs, Battery only, Flight

 

When did you start to experience the issue? Did it work correctly previously? Issue is only on EC135 aircraft, headset call function works properly on AS355 and BH12 aircraft

 

Any troubleshooting steps you took - The only method to get the headset call feature functioning properly was to plug a BluLink into the drop cord, and then the headset into the blulink. This solves the squeal problem but creates a large bundle of cords, causing entanglement concerns in the cockpit, also doesn’t solve the issue of the headset not working as it should.