TTFA
A metric measuring the time from when a user finishes speaking to when a speech system begins playing audio. It is a core measure of voice agent experience, and the industry considers values below 300 ms to approximate the pacing of human turn-taking.
Timeline (last 90 days)
The industry generally believes that when time to first audio (TTFA) is below 300ms, conversation is already close to the rhythm of human turn-taking, and at 150ms it is almost imperceptible as machine latency.
Conversational AI applications typically require TTFA to be below 300ms; otherwise, users will noticeably perceive a pause.
All Facts (2)
The industry generally believes that when time to first audio (TTFA) is below 300ms, conversation is already close to the rhythm of human turn-taking, and at 150ms it is almost imperceptible as machine latency.
50%UnverifiedConversational AI applications typically require TTFA to be below 300ms; otherwise, users will noticeably perceive a pause.
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