2017-11-14 音声AI - Amazon Alexa, Google Assistant, Apple Siri, MS Cortana IoT AI / Machine Learning 音声AI (Virtual AI Assistant) / 搭載AIスピーカー・製品 Amazon Alexa Amazon Echo Google Assistant Google Home Apple Siri Apple HomePod MS Cortana HARMAN社スピーカー Link AI Faceoff: Siri vs. Cortana vs. Google Assistant vs. Alexa