Please rest assured, while it might be possible that your Baby Monitor slightly interfere with your WIFI signal, it cannot totally block it.
Unfortunately, it is not possible to change the channel on your monitor has the best frequency is automatically selected.
Here are a few possibilities that can explain why your WIFI signal is not optimal:
· Wood, plaster, cinder blocks, and glass don't interfere much, but brick, stone, and water (large fish tank) can be more problematic.
Worse still are ceramic, concrete, metal, and mirrors, which reflect visible light and radio waves alike.
· Walls do partially block WIFI signals. Technically, walls don't “interfere”. When talking about radio waves interference is when a radio signal is degraded due to “outside energy”, usually another radio signal.
The WIFI radio waves in your house might be blocked because of one of the above reasons. You can reposition your router to get relatively even signals throughout the house.