Nokia has unveiled new headsets – Boom, Knock and Pop – that have been made by Zound Industries, which was behind headphones by legendary guitar amplifier company Marshall. All the new headsets are a part of a new sub brand called Coloud.The Boom headphones are noise cancelling closed back headphones and have massive ear cans to suspend one’s ears in just the sound. They are available in typical Nokia colours. There is no word if the noise cancellation...