My $300 noise-canceling headphones started making a strange pop on every step — the fix was surprisingly simple

You're out for a stroll, listening to your favorite tunes, when a sudden thump or crackle starts echoing through your ear canal. It happens every time you step off a curb, trip over a crack, or catch a gust of wind. Before you panic and consider buying a new pair of headphones, take a deep breath. That annoying noise might not signal that your premium audio device is defective. In reality, it could be a sign of a hidden buildup of everyday debris interfering with your Active Noise Cancellation (ANC).

ANC headphones employ delicate microphones positioned on the exterior to detect ambient sounds. These microphones instantly generate opposing sound waves to block out the background noise before it reaches your ears. However, when you make a sudden, forceful movement like stepping down hard on the pavement or walking through a gust of wind, the resulting impact sends a sudden rush of air towards those tiny built-in microphones.

Under normal circumstances, the software effortlessly manages these air shifts. But, over time, minute particles of dust, lint, and skin oils accumulate directly over the mesh grilles shielding these external microphones. When air rushes across a partially blocked grille, it generates uneven air friction. Instead of accurately sensing normal background noise, the microphones detect localized air turbulence.

The software becomes confused, attempting to cancel out a noise that is physically vibrating the microphone housing, resulting in that irritating thump, pop, or flutter directly in your ear.

The solution to this issue was surprisingly simple for me. I was experiencing the exact same problem with my Sennheiser Momentum 5s during my daily morning walk. Initially, I assumed my headphones were beyond repair and needed replacement. However, upon closer inspection, I realized the problem wasn't internal hardware damage at all; it was purely physical obstruction.

To rectify this issue, I started by locating every tiny mesh grille or pinhole port on the exterior of my ear cups and earbud stems. Using a soft-bristled toothbrush or an electronics cleaning brush, I gently brushed across the grilles at an angle, being careful not to push the lint deeper inside. Next, I applied a small amount of micellar water to the tip of a cotton swab, as it effectively breaks down skin oils without leaving a sticky residue.

Alternatively, I could have used an electronics-grade rubbing alcohol (70% isopropyl) or a tightly wrung-out wet wipe. Whichever method I chose, I ensured the swab or wipe was barely damp and never dripping before gently rolling it over the mesh openings to lift any stubborn residue.

After allowing my headphones to air dry for about 5 minutes, I put them back on and was delighted to find that the ANC had returned to its crystal-clear performance. This simple cleaning routine has since saved me from unnecessary worries about the longevity of my high-end audio equipment.