Unverified60% confidenceFactExact time
Traditional voice assistants such as early Siri and Alexa are all half-duplex designs, requiring users to wait for the system to finish speaking before continuing to provide input.
2
Sources
60%
Confidence
Long-term
Relevance
7/15/2026
First Seen
Sources
Related Claims
VerifiedEarly voice assistants such as Siri and Alexa adopted a "speak–pause–respond" pipeline architecture, which is essentially half-duplex.85% similarUnverifiedEarly voice assistants such as Siri and Alexa used VAD (Voice Activity Detection) to determine whether the user had stopped speaking, a mechanism that is inherently half-duplex.80% similarVerifiedMost previous voice assistants used a half-duplex mode, which was essentially a walkie-talkie-style turn-taking interaction that required waiting for the user to finish speaking before responding.80% similarUnverified传统语音助手如Amazon Alexa和Google Assistant的本地设备通常只负责唤醒词检测和音频采集，ASR、NLU和TTS都在远端服务器完成72% similar
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