Another new feature is Personalized Spatial Audio, which is meant to further enhance sound quality to your preference. The addition of active noise cancellation to this year's AirPods is arguably the most significant update. The AirPods 4 ANC now have access to the once-Pro-only feature. Additionally, ANC is bidirectional; it will reduce background noise while calls and music are playing. Other features of ANC include Adaptive Audio and Transparency Mode. While the Adaptive Audio cleverly chooses the best mode based on your surroundings, the former enhances outside noise so you can hear your surroundings more clearly. For example, the system will activate Conversation Adaptiveness and other features if it recognizes that you are having a conversation.