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arXiv · 2607.03920

LH-AVLN: A Benchmark for Long-Horizon Audio-Visual-Language Navigation

Rufeng Chen·Yue Chang·Zili Shao·Zhaofan Zhang·Li Chen·Hechang Chen·Hui Xiong·Sihong Xie
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Abstract

Embodied navigation is moving toward long-horizon missions, yet existing long-horizon benchmarks are largely acoustically silent, and audio-visual navigation tasks typically focus on a single goal. We introduce LH-AVLN, a benchmark for Long-Horizon Audio-Visual-Language Navigation that combines multi-goal mission execution, heterogeneous goal specifications, and persistent spatialized acoustic cues. In LH-AVLN, an agent receives a global mission of two to four goals specified by category, language description, or reference image, and navigates with RGB-D observations, pose, and binaural audio in indoor 3D environments. The benchmark supports both ordered and unordered missions, where alternating goal-associated sounds can guide non-line-of-sight search but may also become distractors as mission progress changes. We further develop PAG-Nav, a training-free reference agent that maintains a temporal uniform semantic map and performs progressive goal-state planning, using sound for search while reserving completion for visual-semantic verification. Experiments show that existing vision-language, memory-based, and audio-visual agents struggle to complete full LH-AVLN missions, and that PAG-Nav provides a stronger diagnostic baseline while leaving substantial room for future progress.

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Rufeng Chen, Yue Chang, Zili Shao, Zhaofan Zhang, Li Chen, Hechang Chen, Hui Xiong, Sihong Xie. 2026-07-04. LH-AVLN: A Benchmark for Long-Horizon Audio-Visual-Language Navigation. https://arxiv.org/abs/2607.03920

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