As BlackBox goes global, we go hands-on with its C18 earphones: "Armour Home recently announced that it has been appointed worldwide distributor of Phitek System's BlackBox range of Active Noise Rejection (ANR) headphones and earphones. Phitek says that the level of ambient background noise can reach 60dB in a busy street, 80dB in the office and up to 94dB in the cabin of a passenger jet."
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