I returned the words "keep your voice down" to the security guard when he talked with a lady loudly in one minute of his accusing; 保安让我“小声点”还不到一分钟,他就去跟一位女士大声地说话了,我把他所有的原话还给了他。
Voice pattern recognition has broad prospects of application in unmanned guard, defect detecting, disaster-preventing and so on. 声音模式识别在无人职守、故障检测、灾害预防等方面具有很广阔的应用前景。