In LiveKit, min_speech_duration and activation_threshold are configuration parameters for the Silero VAD (Voice Activity Detection) plugin used in AI agents. min_speech_duration is a

float

parameter with a default value of

0.05

seconds. It defines the minimum duration of speech required to start a new speech chunk. This helps prevent very short sounds or noise from being incorrectly identified as the beginning of speech. activation_threshold is a

float

parameter with a default value of

0.5

. It sets the threshold to consider a frame as speech. The behavior of this parameter is: • Higher threshold: Results in more conservative detection but might potentially miss soft speech. • Lower threshold: Results in more sensitive detection, but might identify noise as speech. Both parameters are available on the

load

method of the Silero VAD plugin and can be configured when initializing the VAD system. These options help fine-tune speech detection behavior for different audio environments and use cases. Sources: Silero VAD plugin | LiveKit Docs | livekit-plugins/livekit-plugins-baseten/livekit/plugins/baseten/stt.py