Aim of this article: This article will describe why you may see reduced wireless (Wi-Fi) signal in different parts of your home or office, and how to improve it.Internal walls: The biggests factors which reduce Wi-Fi performance are the effect distance and internal walls have on signal strength.The following diagrams will show the effect on the wireless signal to devices using your Wi-Fi network in different situations.Even though the data transmitted over Wi-Fi is digital, the actual signal uses analogue radio waves.he following diagrams will show the effect on the wireless signal to devices using your Wi-Fi network in different situations. Even though the data transmitted over Wi-Fi is digital, the actual signal uses analogue radio waves.