Some AirPods Pro users have recently discovered that the device automatically turns on noise cancellation when you start whistling when using the AirPods Pro in transparent mode. They also found that the AirPods Pro automatically turns on noise cancellation if there is a strong fan on site or driving with the window open.
AirPods Pro offers a so-called transparent mode that allows users to listen to music while they can hear external sounds, allowing them to keep abreast of their surroundings. Simply put, AirPods Pro uses a channel system and software analysis to determine how much noise it needs to eliminate from the outside world with a noise-cancelling system. The goal is to keep users on the alert side when they’re running down the street, and the AirPods Pro technically provides a balanced configuration that lets users listen to music without isolating all external noise.
However, some noise slots have proved easy to activate the complete noise-cancelling feature when using the AirPods Pro in transparent mode. Whistleblowing is one of them, and one tuner speculates that it’s all because the device is trying to protect the user’s ears from high-pitched noise.
Apple explains how the noise reduction system works on the AirPods Pro: “With active noise reduction technology, external-facing microphones can detect external sounds, and then AirPods Pro counteracts against noise to eliminate external sounds before they hear them.” An in-directional microphone can listen to unwanted internal sounds inside the user’s ear, and AirPods Pro can counter them by noise reduction.