I ordered two who arrived in Thotho are two different months. I use them since then. But only to save the loud voices and instruments. The bazaar is very comfortable, not heavy, very ergonomic. It insulates very well for what is asked (you will not do jack hammer with which ca ...) I do not know exactly how many dB, but go see for yourself. The sound is absolutely clear, Emine abject. No, really, no, it's infamous. Did you feel like listen to a radio, it's disgusting. To set sounds, I took another headphone that does not isolate at all, but has made a much more natural. This headphone is primarily a voice recording (light or Cree) and isntruments noisy indeed, we can push the volume very well without it in spit. And it insulates. It is the positive. So on ergonomics, insulation, and power, it's all good. Now the other half should be put inside the headphone, ie a quality of its correctness.