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Review title: Yes, but .....
Product review: Probably the message can be confusing. What is 70% noise reduction? Which 30% remain? Noise reduction works well with lower, deeper frequencies. If there is no lower frequencies the effect is difficult to detect. But the technical means to reduce noise seem to be multiple. Inversion of sound signals is one, selective amplification - it seems - another, and as an add-on you get some white noise. If you use it for listening to music the impression of noise reduction is strong. It certainly may be 70% or even more. But if you just use the phones without an mp3 player or another source of sound - it rather feels like 30%-40%. Therefore not 5 but only 4 stars.
