What voice activity detection is and how it works
Overview
ElevenLabs explains that voice activity detection (VAD) classifies short audio frames, typically 10 to 30 milliseconds long, as containing speech or not.
Each frame gets a yes-or-no decision that tells downstream tools such as speech-to-text, LLMs, and turn planners whether to process the audio or wait.
According to ElevenLabs, VAD does not transcribe words. It also does not decide when a speaker has finished talking, which is the job of separate endpointing systems.
Written by AI from the articles below · updated Oct 9, 6:58 PM ET
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- ElevenLabs BlogOfficialWhat is voice activity detection and how does it work?
AIVoice activity detection (VAD) classifies short audio frames, typically 10-30 milliseconds, as containing speech or not. It returns a yes-or-no decision that tells downstream tools such as speech-to-text, LLMs, and turn planners whether to process or wait. VAD does not transcribe words or decide when a speaker has finished, which is the job of endpointing systems.
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