believe the active noise cancellation on the AirPods Max has deteriorated 

.My one-week-old AirPods Max's active noise cancellation (ANC) has gone soft.

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.Now, I hear everything I don't want to hear, and I'm positive the firmware update is to blame  

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The ANC now sounds like the transparency mode for a librarian, in my opinion 

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The finest ANC serenity and quiet I've ever experienced while working was not restored after resetting the AirPods Max by pressing and holding both buttons 

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Similar complaints concerning decreased noise cancelling efficacy following a firmware upgrade were made by Bose QC35 II owners in 2019. 

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Generally speaking, Apple software changelogs are fairly instructive. For instance, this week saw the release of iOS 16.0.2.

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After an upgrade in November 2019 that many users said made their AirPods Pro ANC less effectivemore users reported a similar impact with update 2C54 in 2020 

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s. Some say it’s just a placebo effect, but after my experience, I’m convinced ANC was weakened 

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