AI RESEARCH
Real-Time Voicemail Detection in Telephony Audio Using Temporal Speech Activity Features
arXiv CS.AI
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ArXi:2604.09675v1 Announce Type: cross Outbound AI calling systems must distinguish voicemail greetings from live human answers in real time to avoid wasted agent interactions and dropped calls. We present a lightweight approach that extracts 15 temporal features from the speech activity pattern of a pre-trained neural voice activity detector (VAD), then classifies with a shallow tree-based ensemble.