By eHow Electronics Editor
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Panasonic’s RP-HC70 headphones have noise-cancelling technology that reduces the low frequency sounds below 1500Hz by a third. They reduce the environmental noise created by airplanes, air-conditioners, buses and trains. The battery in the headphones is used only for the purpose of the noise-cancelling facility. The following steps will guide you through the process of using your Panasonic RP-HC70 Headphones: