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A comment on Apple AirPods: iPhone accessory or the next big thing?. Parent comment
It's a simple vent, no pump, active or otherwise. My B&O's have not quite the same, but a flange in the silicon to achieve the same effect.
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It's a simple vent, no pump, active or otherwise. My B&O's have not quite the same, but a flange in the silicon to achieve the same effect.