The Feline-Human Synchronization Protocol (FHSP):  A Load Minimization Approach to Cross-Species Resonance Using Coupled Pendulums

Cats (Felis catus) rarely vocalize during interactions with conspecifics, yet they frequently and strategically produce meowing sounds directed at humans. Within the framework of Load Minimization Theory (LMT), we interpret this vocal behavior not merely as emotional expression, but as an evolved cross-species synchronization protocol that actively minimizes mutual relational load. Modeling the human-cat dyad as a system of coupled pendulums, we demonstrate that feline meows function as targeted periodic stimuli that adjust the human’s fixation strength k(t) and damping coefficient μ(t), facilitating phase-locking toward a shared low-load resonance state (An-soku). Observational and theoretical analyses suggest that this protocol enables cats to achieve efficient environmental and emotional load reduction with minimal energetic cost. This study positions domestic cats as highly sophisticated natural engineers of interspecies resonance, offering new insights into the dynamical mechanisms underlying successful cross-species cohabitation.