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Hi DoubleM, Thank you for the question. There is not a industry standard for measuring active noise-cancellation. The Hearphones utilize both active and passive noise reduction technologies. They use a proprietary electronics approach to active noise reduction, placing microphones to measure noise both inside and outside the earbud. Each situation is unique. We encourage you to give them a try and see how it will work for you! Thank you again, Mohsin - Bose Supports
Sorry, there was a problem. Please try again later.The noise canceling works very well. While on a recent airline flight, I put them on while at the gate and began listening to an audiobook. Things were very quiet and I was enjoying my book. After a while we were still at the gate and I thought they had shut the engines down putting us in for a long delay. I was a little irritated and pulled my earbuds out and was immediately overwhelmed with loud engine noise. They work equally well in the car.
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