An Anechoic Chamber is a shielded room designed to attenuate waves. Anechoic chambers are used to provide a shielded environment for radio frequency (RF) and microwaves. An RF anechoic chamber is designed to suppress the electromagnetic wave analogy of echoes, reflected electromagnetic waves, from the internal surfaces. Both types of chambers are constructed with echo suppression features and with effective isolation from the acoustic or RF noise present in the external environment. In a well-designed acoustic or RF anechoic chamber, the equipment under test receive acoustic, mechanical or RF signals from the signal source, not reflected from another part of the chamber. This ensures the integrity of the testing being conducted. Furthermore, the shielding of the chamber limits interference from equipment located outside of the chamber.