How to Solve Unwanted Hissing Noise from Nokia E3511 Earbuds

Background

I have this Nokia E3511 for about 2+ years. Well, it has its quirky touch triggers. But overall, it's quite good for the reliable Bluetooth connectivity and the sound being produced (flat). I especially appreciate the ANC (Active Noise Cancellation) feature for the budget. I don't use it for online meeting, the mic isn't really a thing there unfortunately. I use it to watch movies and listening music or ambient noise (rain, pink noise, etc.) only.

One day, I opened the box, and each was automatically connected to my laptop. The left earbud produced static hiss noise like insane.

I put back them again in the box, repeated the process. That time, I noticed, even before they were connected, the left earbud was already producing the noise when I took it out; when it was ON.

So, I deducted that it wasn't Bluetooth connection related or laptop related. Instead, it was hardware related, as in the DSP (Digital Signal Processor) of the earbuds.

Usually, digital hardware as this, resetting its state will solve the problem. So I did reset it, and indeed it is back to normal now.

How to Reset Nokia E3511

First, unpair (remove or forget) E3511 from laptop or desktop or mobile device.
Put the earbuds inside the box.
Push the button inside the box for around 5 seconds until the light on the box blinks. It is reset ☑️
Take the earbuds from the box ➡️ Check each earbud. ✅ No more hissing noise 🙂
Pair it again to your device ☑️

Nokia E3511 Troubleshooting List

Official E3511 manual

Problem	Reason	Solutions

Last modified on 2025-03-28T05:39:01-07:00

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