The Role of VAD in Voice Agent Interruption Handling
Voice Activity Detection (VAD) is the first line of defense for handling interruptions, but it's prone to false positives. Here's how modern systems improve it.
When a user interrupts an AI agent, the agent needs to stop talking immediately. This is known as barge-in. The mechanism that detects this interruption is Voice Activity Detection (VAD). However, basic VAD triggers on any noise—a dog barking, a door slamming, or a cough—causing the agent to stop unnecessarily.
Adaptive Interruption Handling
Modern voice agents use adaptive interruption handling. Instead of just detecting volume, they use lightweight neural networks to classify the audio. Is it background noise? Is it a backchannel ('uh-huh', 'yeah')? Or is it a genuine conversational interruption? Only the latter should trigger the agent to halt its TTS playback and listen.
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