The rtings com website has test charts for various noise cancellers. Very informative. Judging by them, it is clear that these Sony and bose qc20 are one of the leaders in noise canceling on the market. But the bare feet are wired, and I messed up with the wires. So I decided to keep these Sonya myself. I use them every day in a minibus for two hours, for this task they do an excellent job. For the office, the work of noise reduction, as he wrote, is unsatisfactory. I will wait from manufacturers for new solutions in the field of noise reduction - buying wired barefoot boots for big money is somehow not very attractive (especially since they are only slightly better than Sony).
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