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.
Rating Newest Oldest. Best Answer: tinny sound, or echo is mostly the cause of a poorly designed and manufactured phone... other causes can include the quality of the line between your home and the central office... an unbalanced pair can cause issues with sound quality and hearing others on the line... a ground will normally cause a hum on the line, but could also cause other audible abnormalities...