Mxsmanic wrote in
:

Safety announcements can override all audio channels, so it isn't
necessary to take headphones off to hear them.

Yep, typical response of a person who never stepped into a plane.

Ya know, safety announcements just may have to be made if something
catastropic happens to the electrial system and flight attendence have to
bark out orders using their own voices. I.E evacutation orders.

Allen