一项调查建议，我们应该将耳机音量控制在80%以内，每天的使用时间不超过90分钟。
One survey advised using earphones for no more than 90 minutes a day at 80% volume.
我最喜欢的功能就是机身左侧的耳机插孔，就在音量控制键上面。
One feature I'm happy to see is the headphone jack on the left side, just above the volume control rocker.
其它的例如播放和音量控制都从机身移到耳机线上去了。
Other controls for playing and changing the volume have been moved off the device entirely and into the wire running from the headphones.
这款耳机配有一根五彩纺线的导线，耳线上有回放和音量控制，三种尺寸的耳机头，甚至还配有一个与iPhone或iPod接口的麦克风。
They come with a cool, colorful and fabric-covered cord, playback/volume controls right on the cable, three sizes of tips and even a microphone for use with the iPhone or iPod Touch.
耳机：全声音的音量控制。
耳机：全声响的音量控制。
耳机：全声响的音量控制。
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