Expired60% confidenceFactExact time
Natural pauses in human conversation typically range from 200 to 500 milliseconds, and if TTS TTFB exceeds this threshold, users will noticeably perceive unnatural latency.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Multi-Model Unified Orchestration Framework: Runtime Dynamic Switching Across Eight AI Services in Practice
bilibili熊猫淘金6/6/2026
Related Claims
VerifiedThe industry-recognized threshold for natural conversation is an end-to-end latency of 500 milliseconds or less; beyond this threshold, users will noticeably perceive a pause.80% similarVerifiedThe human perceptual tolerance threshold for latency in natural conversation is approximately 300 milliseconds.79% similarUnverifiedCompressing TTS time-to-first-byte latency to within 50 milliseconds means nearly imperceptible instant feedback.76% similarUnverifiedThe output latency of ChatGPT's real-time voice can be compressed to under 300 milliseconds, reaching the natural response threshold of human conversation.74% similarUnverifiedA Time to First Token (TTFT) below 500ms is generally considered a smooth interactive experience, while exceeding 2 seconds creates a noticeable sense of waiting.74% similar
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