Simon Schneider Ceyhun Özdemir Heiko Gimperlein Karsten Urban Bernd Graf A Stable Boundary Element Method for Reliable Long-Time Industrial Sound Emission. 2026 July abs/2607.02308 CoRR https://doi.org/10.48550/arXiv.2607.02308 db/journals/corr/corr2607.html#abs-2607-02308 streams/journals/corr