In the high-ANL group, although the annoyance level was reduced in the DNR on than in the DNR-off condition, it failed to reach statistical significance.
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The Effect of Digital Noise Reduction on Annoyance and Speech Perception in Low and High Acceptable Noise Level Groups.
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The sentences
The annoyance toward noise observed was high when DNR was off than unaided ( p = 0.159) and DNR on condition ( p = 1.012), these differences have failed to reach significance.