Band: opinion spread · Dot: weighted average
Sources split almost exactly in half, and part of the split is about firmware. One side calls the noise cancelling very good, close to Sony and Bose on steady drone like planes, buses and air conditioning. The other side calls it middling, a step behind the flagships, weak against voices and sudden sounds, and softer on passive isolation than the Momentum 3. Many owners also say some 2023 firmware versions left the noise cancelling almost ineffective until later updates, and wind-noise reduction can undo it outdoors.
Measured
SoundGuys measures the Sony WH-1000XM5 cancelling about 5 dB more noise, and puts the M4 at roughly 75–95% reduction of high-pitched noise and about 75% of low-pitched noise. TechGearLab measured passive reduction of only ~13 dB in the bass, ~22 dB in the mids and ~35 dB in the treble, and found that turning the noise cancelling on added only a little. RTINGS lists weak low-rumble reduction as its main noise-cancelling con. On Amazon, 280 of 461 buyers who mention noise cancellation are positive and 181 negative. On Head-Fi and Reddit, owners tie a sharp drop in noise cancelling to specific 2023 firmware versions. An RTINGS commenter reports that a January 2026 update (3.37.3) improves it.
vs. listeners — The lab numbers put it clearly behind the Sony and Bose flagships but not far behind (about 5 dB, per SoundGuys). Owners who call it 'broken' mostly describe particular firmware versions or wind-noise reduction switched on, so one person's experience depends on the unit's software as well as the hardware.
“Plus, the powerful noise cancelling blocks out chatty neighbors very well.”
RTINGS
“The ANC is slightly behind the rest of the high-end pack, but the battery life blows every other competitor out of the water.”
SoundGuys
