Unverified50% confidenceFactExact time
早期语音AI系统如微软Cortana、亚马逊Alexa依赖VAD（端点检测）作为半双工架构，在嘈杂环境中脆弱
1
Sources
50%
Confidence
Long-term
Relevance
7/15/2026
First Seen
Sources
Related Claims
UnverifiedEarly 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% similarUnverified早期语音AI系统受限于端点检测（VAD）技术，本质上是半双工架构79% similarUnverifiedThe new voice mode directly challenges traditional voice assistants such as Google Assistant and Amazon Alexa, which rely on serial pipeline architectures.78% similarVerifiedEarly voice assistants such as Siri and Alexa adopted a "speak–pause–respond" pipeline architecture, which is essentially half-duplex.77% similarUnverifiedResearch by Amazon's Alexa team indicates that optimal voice interaction should present no more than 3 options at a time, beyond which users' cognitive load rises sharply.76% similar
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