Bose/ZDNETIt’s been almost two years since Bose released the QuietComfort Ultra Earbuds and headphones, introduced the Ultra moniker, and declared this line of headphones and earbuds its best products. The QC Ultra Earbuds are among our favorite noise-canceling earbuds, and now, Bose has announced the QC Ultra Earbuds (2nd Gen).Also: The 12 best headphones of 2025The QC Ultra Earbuds debut with a list of refinements compared to their predecessors, including an updated AI algorithm for noise cancellation and voice pickup, wireless charging, and a refreshed design.The first-gen QuietComfort Ultra Earbuds have exceptional noise-canceling capabilities, thanks to four microphones in each earbud and AI-powered algorithms that analyze ambient noise and filter out unwanted sounds. According to Bose, the QC Ultra earbuds (2nd gen) have an updated algorithm that improves the earbuds’ noise-canceling performance, especially when ActiveSense is enabled.Also: Why I travel with Bose’s QuietComfort Ultra instead of the Sony XM5 headphonesThe ActiveSense feature is one of my favorites to use with my QC Ultra headphones, as it keeps you aware of your surroundings while quieting sudden loud noises in your environment. Bose says the updated algorithms make the sudden transition from transparency mode to active noise cancellation smoother, which should improve the user experience. More