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arXiv · 2512.10778

Building Audio-Visual Digital Twins with Smartphones

Zitong Lan·Yiwei Tang·Yuhan Wang·Haowen Lai·Yiduo Hao·Mingmin Zhao
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Abstract

Digital twins today are almost entirely visual, overlooking acoustics-a core component of spatial realism and interaction. We introduce AV-Twin, the first practical system that constructs editable audio-visual digital twins using only commodity smartphones. AV-Twin combines mobile RIR capture and a visual-assisted acoustic field model to efficiently reconstruct room acoustics. It further recovers per-surface material properties through differentiable acoustic rendering, enabling users to modify materials, geometry, and layout while automatically updating both audio and visuals. Together, these capabilities establish a practical path toward fully modifiable audio-visual digital twins for real-world environments.

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Zitong Lan, Yiwei Tang, Yuhan Wang, Haowen Lai, Yiduo Hao, Mingmin Zhao. 2025-12-11. Building Audio-Visual Digital Twins with Smartphones. https://arxiv.org/abs/2512.10778

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