Title: Disappointing performance
Product review: Maybe my expectation was too high. I wasn't impressed at all by its noise reduction performance during the flight from Boston to Denver on B-737.I'll try a brand new battery on the next flight.Up-date:I tried it again with a brand new AAA battery; flight from Logan to BWI on B-717. Noise reduction only slightly better than the last time. It seems that the noise reduction frequency band is too narrow (low frequency only).
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