How does AI detect Voice?
When you're talking to another person, they naturally know when you've started speaking and when you've finished.
Voice AI doesn't.
Before an AI can understand what you're said, it first needs to determine whether you're speaking at all. This is the role of Voice Activity Detection (VAD).
VAD is a system that continuously listens to incoming audio and decides whether it contains human speech or background noise.
VAD filters the audio and identifies the portions that actually contain speech. This reduces unnecessary processing and helps the assistant respond at the right moment.
Without VAD, a voice assistant wouldn't know when to start listening, when to stop listening, or when it's appropriate to respond.
It decides when speech begins and when it ends before the audio is sent for transcription.
How does VAD work?
A VAD system continuously analyzes the incoming audio stream.
It looks for characteristics that resemble human speech, such as:
Voice energy (volume)
Speech frequencies
Speaking patterns
Duration of sound
If speech is detected, the audio is forwarded to the Speech-to-Text system.
If only silence or background noise is detected, the audio is ignored.
How does AI detect Voice?
VAD filters the audio and identifies the portions that actually contain speech. This reduces unnecessary processing and helps the assistant respond at the right moment.
Without VAD, a voice assistant wouldn't know when to start listening, when to stop listening, or when it's appropriate to respond.
It decides when speech begins and when it ends before the audio is sent for transcription.
How does VAD work?
A VAD system continuously analyzes the incoming audio stream.
It looks for characteristics that resemble human speech, such as:
Voice energy (volume)
Speech frequencies
Speaking patterns
Duration of sound
If speech is detected, the audio is forwarded to the Speech-to-Text system.
If only silence or background noise is detected, the audio is ignored.
When you're talking to another person, they naturally know when you've started speaking and when you've finished.
Voice AI doesn't.
Before an AI can understand what you're said, it first needs to determine whether you're speaking at all. This is the role of Voice Activity Detection (VAD).
VAD is a system that continuously listens to incoming audio and decides whether it contains human speech or background noise.