Installing ceramic or porcelain tile is both an art and a science. Tile installers must know the composition of the tiles as well as how to lay them in place attractively. Besides the normal costs of labor and materials, a tile project's costs vary by the type of sub-flooring to be used as a foundation for the tile.
Three things can cause an EMI problem: A signal source creates some kind of noise, there is a transmission path for the noise, and/or there is a receiver sensitive enough to be distorted by the noise, as shown in Figure 1.
There is a loud chewing/scraping noise coming from inside the soffit of our house, and there are bees flying around outside. The noise cannot be caused by bumblebees as their jaws are just not strong enough to chew wood. However there are a number of other insects that can chew wood.