How does changing the amplitude affect the energy of the wave

A wave can be simply defined as a disturbance that can propagate from one place to another and in doing so, it carries energy and is comprised of a definite wavelength and amplitude. These waves can be of high or low energy.

In a wave, there is a direct relationship between the amplitude and the energy as the energy is directly proportional to the double of its amplitude. This means that increasing the amplitude of a wave, the energy increases by double of it. And if the amplitude decreases then the energy abruptly decreases.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia