Review on Sennheiser HD 4.50 BTNC Bluetooth Wireless Headphones Featuring Active Noise Cancellation in Black and Silver by Jhalak Jhalak ᠌

The feeling that I overpaid 3k for an option (compared to HD 350 BT), which not only does not work as it should, but also amplifies and distorts background noise. Its pros: The ears are good, they sit perfectly, they keep the signal remarkably (15 meters - everything is ok), the passive noise isolation is excellent, they hold a charge for a long time. Cons: The Active Noise Cancellation (ANC) system works just disgustingly, as if adding transparency to ambient noise. The conversations of others are amplified and distorted, without ANC they cannot be heard. I tested a vacuum cleaner, a train car, the Minsk metro, a laboratory centrifuge with different background noises, in all cases ANC adds transparency to noises, no matter with or without music .