I am experiencing a technical issue that I can’t even explain, let alone fix.

Short Version: My laptop’s video link to our television regularly drops out for 10-15 seconds when anyone steps too heavily on a particular area of the floor.

Long Version (because I don’t know which details might matter):

My wife and I regularly participate in video meetings with friends, so we have a setup for it in our living room. My laptop serves as the computer. It is connected to a Thunderbolt 4 hub on a side table to the left of my easy chair.

There is a video adapter connected to the hub. 20’ HDMI and USB cables run along a wall to the left of the table to connect the hub to the television and the camera that’s mounted on it (Logitech Brio 4K). Another 20’ USB cable runs behind the chair and forward along the right side where it connects to a microphone (Logitech Yeti X). The microphone is on another small table that extends out into the room just in front of the chair arm.

My wife uses an easy chair immediately to the right of mine. The microphone wire runs between the chairs, but does not touch either. None of the cabling or devices are in front of, behind, or to the right of that chair.

The problem is that when my wife gets up, the tv picture often goes black for 10-15 seconds. The television indicates that it no longer has a signal during that time. Then the picture comes back and things return to normal. During that time, the camera and microphone both continue to work normally.

The drop-out happens when she puts weight on the floor immediately in front of the chair, not when she puts pressure on the chair to get up.

Occasionally the drop-out will happen when one of our dogs (50-75 pounds) jumps down from the chair onto the same area or when someone walks across the area. The section of floor where this happens is no more than a couple of feet square, starting at the front of the chair and extending out in to the room. There are no cables or wires in the immediate vicinity on the floor and there is no electrical wiring under that section of floor.

We have speculated about static electricity, but there is no obvious way it would get into the microphone wiring across at least an 18" gap. I also replaced the microphone’s USB cable with one that is better shielded, which made no difference.

So what could cause the video signal to drop-out when someone puts weight on a section of the floor with no apparent connection to any part of the system?

Any theories or suggestions would be welcome. We are genuinely mystified.