By default, Active Noise Cancellation requires both of your AirPods Pro to be in your ears. For Noopl users with hearing in both ears, we recommend using both AirPods in Active Noise Cancellation Mode to block as much external sound as possible. For those with limited or no hearing in one ear and use a single AirPod Pro, here is the way to enable Active Noise Cancellation when using just one AirPod Pro.
- Open the Settings app on your iPhone
- Tap Accessibility
- Tap AirPods
- Select the appropriate AirPods Pro.
- Toggle the "Noise Cancellation with One AirPod" so it is enabled.