![]() ![]() ANC headphones require a separate power source and some people find them uncomfortable to use, perceiving part of the interference wave as a high-pitched whine. This works best with regular low-frequency sounds, such as engine noise, but it does little against other sounds such as conversations and clattering computer keyboards. The unit’s circuitry then generates an interfering sound wave to cancel out the background noise. Active noise cancellation (ANC) uses microphones located on the headphones to pick up ambient noise. Instead, the headphones' active noise cancelling wraps you in a wall of silence that blocks droning irritations such as the noise of engines, air-conditioners and servers. This makes it easy to hear announcements or conversations.īecause they sit so lightly on the ear, it doesn't really feel as though you're blocking out the world. The box includes a noise cancellation switch, a volume control and a "defeat" button that stops music and plays all the external sound picked up by the noise cancelling system instead. Indeed, they weigh 100g and the entire unit, including the battery and noise-cancelling control box, comes in at just 137g. The headphones are light enough to wear all day. ![]() ![]() The ear cups can be folded inwards to make the headphones more portable, and they can be adjusted to fit any skull, from small to large, so comfort isn't a problem. The headphones are designed to be compact, so they have a thin, flexible and slightly fragile-feeling headband. ![]()
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