A brief note to be expanded upon later. These are some rough examples of how much signal attenuation to expect at 2.4Ghz when going through several everyday objects.
- Window Brick Wall 2dB
- Metal Frame Glass Wall into Building 6dB
- Metal Door in Office 6dB
- Cinder Block Wall 4 dB
- Metal Door in Brick Wall 12.4dB
- Brick Wall next to Metal Door 3dB
See also: http://www.intersil.com/design/prism/papers/symposum.pdf