Hello Gustavo.
You will understand that it is difficult to orient a noise at a distance, that we also do not know what sound it emits

. If it is a tapping it can be caused by shock absorbers, axial, zipper, connecting rods or ball joints, a spring noise depending on the irregularities of the terrain can be caused by bushings with wear and / or slacks.
In any case for safety, a check in a specialized suspension workshop is suggested to determine the condition.
Salu2.