Advanced Noise Cancelling. Whether on a long-haul flight or visiting a café: the WH-1000XM4 headphones filter out even more high and mid-frequency sounds, providing outstanding performance for noise minimization. Ambient Sound Control. With the Sony Headphones Connect app, you can adjust ambient sounds so that they are minimized while still allowing you to hear important sounds like announcements when you're on the go. Wireless freedom - high-quality sound. LDAC transmits about three times the amount of data (with a maximum transfer rate of 990 Kbit/s) compared to conventional Bluetooth audio, allowing you to enjoy high-resolution audio content in nearly the same quality as wired connections. Faithful reproduction. The HD Noise Cancelling Processor QN1 includes an analog amplifier that ensures an unparalleled signal-to-noise ratio, low distortion, and excellent sound quality in portable devices. With 40mm drivers featuring liquid crystal polymer membranes, these headphones deliver powerful bass and reproduce the entire frequency spectrum up to 40 kHz. Real-time restoration of all compressed files. DSEE Extreme (Digital Sound Enhancement Engine) optimizes compressed music files in real-time using Edge AI developed with Sony Music Entertainment. The dynamic detection of instrumentation, music style, and other characteristics of each track restores high frequencies for a rich sound. Everyday usability with Speak-to-Chat. The intelligent Speak-to-Chat function automatically pauses the music and switches to ambient sounds as soon as you start speaking to someone. This allows you to have conversations even while wearing the headphones, for example, when your hands are full. The Precise Voice Pickup technology, five built-in microphones, and modern audio signal processing recognize your voice and respond accordingly.