Recently, Apple’s researchers have discovered that wearables such as AIrPods The device may be used to monitor and estimate the user's breathing rate. This discovery will open up another feasible way for biometric health sensors.
 

Clinically, respiratory rate is a useful indicator for assessing physical health. In a paper on Apple's machine learning research website, researchers found that "wearable headphones" can use the device's onboard microphone to pick up audible inhalation and exhalation during exercise.

This method of remotely estimating breathing rate is more economical and more efficient. You can use "easy-to-use, aesthetically acceptable" non-invasive wearable devices to track disease progression and cardiorespiratory health for a long time.
 

At present, Apple is also studying the addition of health detection functions to wearable devices such as wireless earphones. For example, an Apple patent describes a fitness monitoring system based on earphones. The system integrates a biometric sensor to detect the user's physiological indicators.