ANC background noise level

ANC background noise is handled very well: one review cites about 30dB of reduction, while another highlights the near-absence of hiss.

ANC is said to add virtually no audible white noise when music is paused.

Reviewers generally found the ANC background very quiet, with little hiss or distracting processing noise, though some midrange sounds could still leak through in difficult environments.

Ambient processing drew criticism in several reviews for hiss or static, especially in transparency mode and sometimes with ANC active but no music playing.