A rack system including a plurality of cages, wherein each cage comprises a respective plurality of outside surfaces, a plurality of housing areas, each housing area corresponding to a respective one cage of the plurality of cages, each housing area comprising a respective plurality of inside surfaces of the rack system and arranged to support at least a portion of one of the respective plurality of outside surfaces of its corresponding one cage, and a plurality of coaxial piezoelectric cables, each coaxial piezoelectric cable corresponding to a respective one cage of the plurality of cages and at least indirectly coupled to its corresponding one cage.