https://wccftech.com/airpods-pro-firmware-2c54-has-bad-noise-cancellation-better-bass-response-apple-has-pulled-the-update/ > Apple released firmware 2C54 for the AirPods Pro in mid-December and it comes with a gift for users in the form of bad noise cancelling. > Since its launch, Apple has released two firmware updates for the AirPods Pro so far. 2B588 was released back in November of 2019 and 2C54 released only recently in mid-December. It appears as though the latest update might not be playing along nicely with a lot of users out there as some believe that noise cancelling may have taken a hit. This is particularly noticeable when you turn on noise cancelling in an environment that has a lot of low-end noise, such as the engine of a plane or a train. The noise isolation in the bass range is not that good with the 2C54 update. In fact, RTINGS did a test of their own and found out the following: