Clearer Sound, Less Noice The WF-1000XM4 provides industry-leading noise cancellation. The newly designed Integrated Processor V1 provides even better noise cancellation. Specially developed by Sony, the Integrated Processor V1 takes the noise cancellation performance of Sony’s acclaimed QN1e chip and goes even further. Improved noise-cancelling performance and Bluetooth ‘System on Chip’ technology delivers the industry’s highest level of noise-cancelling yet uses less power than its predecessor. The WF-1000XM4 features high-performance dual noise sensor microphones for excellent noise cancellation. By having two noise sensing microphones per ear – one feed-forward, and one feed-back – ambient noise is heard and analysed, resulting in highly accurate noise cancellation.