Sennheiser PXC250 review
I have started using the sennheiser pxc250 on the BART train. You can still hear the train noise — it’s reduced, but not as much as earplugs you might buy for a couple of dollars. Also, some of the BART noise is the metal wheels against metal tracks which is high pitched and is not cancelled by the circuitry that is designed for lower pitched noise. I haven’t tried adding music yet which is what the headphones were designed for. Probably an in-the-ear design (such as etymotics) would provide better noise isolation than open-air with cancellation circuitry. 15db reduction.
I tried it in a machine room with lots of equipment fans. You can hear noise, outside of headphones, but it does indeed reduce the intensity. It would be better if the phones fit the ears tighter.
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