You paid for the best noise cancellation in any wireless earbud right now, so when your Sony WF-1000XM6 suddenly sounds like it's not doing anything, that's a problem. The good news is almost every cause of weak ANC is fixable through the Sony Sound Connect app or with a simple ear tip swap.
Start with the thing that causes the most false positives: ear tip fit. ANC needs a complete seal inside your ear canal to work properly. Even a tiny air leak drastically cuts how much noise the active circuitry can cancel. Open Sound Connect, tap your WF-1000XM6, then Sound > Earbud Fit Test. Run it for both sides. If either fails, switch to a different tip size and test again. Sony includes XS, S, M, L, and XL in the box, and most people default to the size that feels okay but doesn't actually seal.
Run the Fit Test Before Anything Else
The fit test sends tones into each ear and measures how well the tip blocks them. A pass means your ANC is working at full spec. A fail means noise is leaking in around the silicone, and no amount of software tweaking will fix that. Don't trust how the buds feel, run the actual test. Sony's included tips are firmer than some competitors, so they can feel snug while still leaking sound.
If none of the included sizes pass, Comply foam tips fit the WF-1000XM6 stem and give a deeper seal for many ear shapes. Sony also sells replacement silicone tip packs with the same sizes if you damaged yours.
Disable Wind Noise Reduction Indoors
This is the one setting Sony specifically warns about. Wind Noise Reduction cuts ANC performance when there's no wind to suppress, but the feature runs by default. Indoors, it just hands you weaker ANC for zero benefit. In Sound Connect, go to Sound > Wind Noise Reduction and toggle it off. Turn it back on when you're outside walking or running and wind handling matters more than absolute quiet.
Try Forcing ANC Manually Instead of Adaptive
Adaptive Sound Control learns your locations and activities, then auto-switches between ANC modes. It's clever when it works, but sometimes it misreads what you're doing and drops you into Ambient mode when you wanted full quiet. The WF-1000XM6 uses your phone's location data for this, and a stale GPS lock can confuse it.
In Sound Connect, go to Sound > Adaptive Sound Control and toggle it off temporarily. Then tap the noise control button on the main app screen and set ANC to maximum manually. If everything goes quiet, Adaptive was the problem. You can re-enable it later or leave it off if you prefer manual control. This fix also helps if you're on Android 14+ where Sound Connect occasionally crashes, Adaptive seems to trigger the bug more frequently.
Update the Firmware Through Sound Connect
Sony pushed several firmware updates after the WF-1000XM6 launched in early 2026 that directly improved ANC processing. Version 2.1.0 around mid-March 2026 was the big one, it fixed weak ANC reported on some early units. To check, open Sound Connect, tap your earbuds, then System > Software Update.
Both buds need to be in the case with the lid open and at least 50% case battery. The update takes about 15 minutes. Avoid heavy Bluetooth activity on your phone during the update, a failed transfer means starting over from scratch.
Reset the Earbuds to Clear Stale Configuration
If firmware is current and fit is solid, a factory reset clears corruption in the ANC processing chain. Place both buds in the case with the lid open. Press and hold the reset button on the back of the charging case for about 20 seconds. After roughly 15 seconds, the case indicator flashes orange for about 5 seconds, then turns off completely. That's a full reset. You'll need to re-pair with your phone afterward.
After the reset, the ANC profile rebuilds from a clean state. Run the ear tip fit test again before judging performance, the recalibration works better on a fresh configuration.
Re-Run the Personal NC Optimizer
The WF-1000XM6 includes a Personal NC Optimizer that measures the pressure inside your ear canal and shapes the ANC curve specifically for you. If you ran this once at setup and haven't touched it since, the calibration may be outdated, especially if you switched ear tip sizes or the buds settled differently into your ears over time.
In Sound Connect, go to Sound > Optimize Noise Cancelling and run the calibration. Sit still in a quiet room while it runs through the test sequence, it takes about 30 seconds. The improvement after a fresh calibration is often dramatic if you'd been running the launch defaults.
Clean the Microphone Openings on Each Bud
The WF-1000XM6 uses feedforward and feedback microphones for ANC. These mics pick up ambient noise so the processor can cancel it, but if their openings get blocked by earwax or lint, the ANC processor gets inaccurate data. The mic holes are tiny ports near the bottom of each bud shell.
Use a soft, dry brush to sweep across them gently. Compressed air at low pressure works too. Clean both buds even if you only suspect one side has the issue, the ANC engine balances data from both channels. Don't use anything sharp, the mesh layer is delicate.
Adjust Call-Related ANC Reduction
If ANC sounds fine when you're listening to music but goes flat specifically during phone calls, this is the setting Sony documents. Capture Voice During a Phone Call intentionally reduces ANC so the mics can pick up your voice clearly. In Sound Connect, find it under the call settings and toggle it off if you'd rather keep full noise cancellation during calls and accept slightly less voice clarity on the other end.
Note that ANC is strongest against consistent low-frequency noise like engine hum, HVAC systems, and traffic. It handles sudden voices and clattering dishes far less effectively. If you're testing the WF-1000XM6 in a busy coffee shop, that's the hardest scenario for any ANC earbud, including these. The 88% noise reduction Sony cites lines up with cabin and traffic noise, not unpredictable chatter.
If you've run through all of the above and ANC is still flat, the feedback or feedforward microphone hardware on one or both buds may have failed. Sony's one-year limited warranty covers manufacturing defects. Start a claim through the Sony support site. Out of warranty, contact Sony Service for a repair quote, some regional centers can replace a single bud for less than buying a new pair.
