{"ID":2871488,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2509.10764","arxiv_id":"2509.10764","title":"LubDubDecoder: Bringing Micro-Mechanical Cardiac Monitoring to Hearables","abstract":"We present LubDubDecoder, a system that enables fine-grained monitoring of micro-cardiac vibrations associated with the opening and closing of heart valves across a range of hearables. Our system transforms the built-in speaker, the only transducer common to all hearables, into an acoustic sensor that captures the coarse \"lub-dub\" heart sounds, leverages their shared temporal and spectral structure to reconstruct the subtle seismocardiography (SCG) and gyrocardiography (GCG) waveforms, and extract the timing of key micro-cardiac events. In an IRB-approved feasibility study with 25 users, our system achieves correlations of 0.88-0.95 compared to chest-mounted reference measurements in within-user and cross-user evaluations, and generalizes to unseen hearables using a zero-effort adaptation scheme with a correlation of 0.91. Our system is robust across remounting sessions and music playback.","short_abstract":"We present LubDubDecoder, a system that enables fine-grained monitoring of micro-cardiac vibrations associated with the opening and closing of heart valves across a range of hearables. Our system transforms the built-in speaker, the only transducer common to all hearables, into an acoustic sensor that captures the coar...","url_abs":"https://arxiv.org/abs/2509.10764","url_pdf":"https://arxiv.org/pdf/2509.10764v3","authors":"[\"Siqi Zhang\",\"Xiyuxing Zhang\",\"Duc Vu\",\"Tao Qiang\",\"Clara Palacios\",\"Jiangyifei Zhu\",\"Yuntao Wang\",\"Mayank Goel\",\"Justin Chan\"]","published":"2025-09-13T00:32:54Z","proceeding":"cs.HC","tasks":"[\"cs.HC\"]","methods":"[]","has_code":false}