Sound Cutting Out

I am a long time customer and have been experiencing an issue where the sound (not video) drops out for a second at a time. This happens every 5 minutes or so. It happens in both my main room and bedroom. Each have their own cable box.  The master is in the main room and the smaller box is in the bedroom. I have done multiple resets but no luck. Both TV's are LG models. Both TV's have soundbars. DVD or Internet via the tv do not have this issue. There are no splitters in the house. Has anyone experienced this? Thanks.