Glass has one speaker, a Bone Conduction Transducer, that sits near your right ear. The speaker isn't especially loud, and doesn't work well in noisy areas -- it's especially hard to hold a conversation via a phone or video call. In loud environments, I've found that it works best to so place a cupped hand over the ear to make it easier to hear.

谷歌眼镜有一个麦克风，也是骨导传感器，靠近右耳。麦克风的音量不大，在嘈杂的区域里性能不好--尤其是打电话或视频通话的时候。环境较嘈杂时，我发现若用手捂住它，音量效果还稍微好点。

Using Glass is all about making the most of voice commands. When Glass wakes up, either by tapping the touchpad or moving your head up, the magic phrase of "OK Glass" appears on the screen below the time. Muttering that phrase activates Glass, and allows you to sift through the currently available commands. Sadly, in its current form, Glass doesn't care who voices commands. That means anyone can shout out and take control of Glass.

大多数时候都是通过语音控制来使用谷歌眼镜。当开启眼镜后，无论是用手触碰触摸板，还是抬头控制，神奇的短语“Ok Glass”就会即刻出现在屏幕上。轻念短语就能激活眼镜，进入当前可用指令。遗憾的是，就目前版本来说谷歌眼镜还不能识别不同的声音。那就意味着任何人都可以发出指令来操作。

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