Sony WF-1000XM4 True Wireless Noise Canceling In-Ear Headphones Everything in the Sony WF-1000XM4 headphones has been redesigned from the ground up. The new Integrated Processor V1, specially developed by Sony, cancels more noise than ever, a new driver with more performance, newly designed noise sensing microphones, and innovative Noise Isolation Earbud Tips with a more stable fit. High-Performance Dual-Noise-Sensor Microphones Two noise-sensing microphones per earbuds – one forward-facing and one backward-facing – catch more ambient sound around you. This means more stable noise canceling and less distortion at any volume.Newly developed Noise Isolation Earbud Tips feature a unique polyurethane foam material. Soft and elastic, it maximizes the surface contact area between the earbud tip and the ear canal, eliminating gaps