Skype for Business Online Call Quality over 802.11ac vs 802.11n wifi

Using Microsoft Call Quality Dashboard I stumbled on the fact that call quality for people using 802.11ac wifi is 4x better than for someone on 802.11n radio.
What could account for such a dramatic difference?

For one month 802.11ac: 978 good calls and 8 poor - .81% poor.
For 802.11n: 390 good calls and 14 poor - 3.47% poor.

Any thought as to how radio type would affect call quality to that degree?
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amigan_99Network EngineerAsked:
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David Johnson, CD, MVPRetiredCommented:
AC is first of all faster than N
AC also allows for 5GHZ access points with wider channels and less interference.
2.4GHZ is pretty crowded wireless mice/keyboards/microwave ovens etc

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amigan_99Network EngineerAuthor Commented:
Thanks much David
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