Most hearing aids have the option of using different programs for different listening situations. You typically access the programs using a button on the hearing aids or with a remote. If yours have this option, ask your audiologist to setup a program optimized for headphone listening.
You can even take your headphones to the appointment so the program can be customized for them. It should be possible to eliminate feedback when wearing your headphones without requiring you to take out the hearing aids.
You can even take your headphones to the appointment so the program can be customized for them. It should be possible to eliminate feedback when wearing your headphones without requiring you to take out the hearing aids.