What is the new air pressure noise reduction of Sony noise reduction earphone WH- 1000XM2?

The air pressure sensor is built in the earphone cavity of Sony noise reduction earphone WH- 1000XM2, which mainly provides noise reduction performance as close as possible to the ideal state on the plane when traveling. Because the change of air pressure in the engine room, that is, the change of air density, will lead to the change of sound propagation mode from the driving unit to the eardrum, so it is difficult to obtain ideal noise reduction performance. The air pressure sensor will feel the change of ambient air pressure and optimize noise reduction according to this change.