Apple
apple.com | FROM: https://www.apple.com/airpods-max/
Q: What sensors are in the Apple AirPods Max?
Answers:
A: There are 5 types of sensors, and 9 sensors total in the Apple AirPods Max. There are 2 optical sensors (1 in each ear cup), 2 position sensors (1 in each ear cup), 2 case-detect sensors (1 in each ear cup), 2 accelerometer sensors (1 in each ear cup), and 1 gyroscope sensor (in the left ear cup).