The project Hertzian Spirits explores, through a series of installations and devices, Hertzian waves as phenomena that are both invisible and omnipresent. The pieces invite us to perceive these waves as floating presences, situated between technical entities and spiritual forces. Although they seem intangible and immaterial, they govern our daily lives. By treating them as spectral presences, their presence is conferred with a quasi-mystical dimension. Through the creation of handcrafted antennas and interactive installations, this project aims to shed light on this elusive environment and express the transitory nature of these signals in movement, form, light and sound. Following in the footsteps of the 19th-century spiritist community, who attempted to communicate with the afterlife through machines, these installations aim to reveal these technical ghosts. These kinetic sculptures, inspired by telecommunications infrastructures, embody these entities by giving them tangible form. These totems become symbols of these ghostly presences, acting as relays between the visible and the invisible, the material and the immaterial.