By eHow Electronics Editor
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Listening to music becomes even more of a pleasure when you use the Sony MDR-NC6 Noise Canceling Headphones. The headphones block up to 70% of all outside ambient noise by detecting low-frequency sound and generating a sound signal to counteract it. The headphones are great for travel, allowing you to enjoy your music without the background noise of a plane or motor engine. While the headphones will transmit sound without the batteries, the noise canceling mechanism requires one AAA battery to function.