How to Improve Sound Quality in Bluetooth Mode

If the sound quality is poor when playing music or white noise in Bluetooth Mode, try the following:

1. Adjust the fit: try different ear tip sizes and make sure they fit securely in your ear canals.

2. Try different size combinations: if one earbud feels unstable, try different ear tip sizes for the left and right earbuds, such as a medium ear tip on the left and a large one on the right. This may improve sound quality.

3. Try different audio content: play different types of music to check whether the original audio source contains distortion or noise.

4. Clean the ear tips and dust mesh: clean them, then try again.

5. Switch the white noise source: switch to a different white noise source in the soundcore app.

How to Improve Noise Cancellation

If noise cancellation is not as effective as expected, try the following:

1. Choose the right ear tips: the combination of ear tips and ear wings affects sound isolation. If noise reduction is poor, try different ear wing and ear tip sizes. You can also run Fit Test in the app by going to Settings > Fit Test to check whether the current ear tips are suitable.

2. Confirm the ear tips are installed correctly: refer to the product instructions to make sure the ear tips are installed correctly.

3. Wear the earbuds correctly: follow the wearing guide and make sure noise cancellation is enabled.

4. Clean the earbuds: clean the front nozzle and microphone mesh to make sure they are not blocked by dirt or debris.

How to Adjust Prompt Tones

You can turn off prompt tones in the soundcore app. Go to Settings > Prompt Tones, then turn off the corresponding prompt tones.

The following prompt tones can be turned off: Bluetooth Mode switching, noise cancellation on / off, low battery, and auto power-off. Low-battery and auto-power-off prompt tones are turned off by default.

What to Do if You Hear Your Own Heartbeat or Pulse

If you can hear your own heartbeat or pulse after putting on the earbuds, try the following:

1. Try different ear wing and ear tip sizes, and adjust the wearing angle.

2. Turn off noise cancellation and try again to check whether the sound disappears.

Understanding Call Support

Anker soundcore Sleep Earbuds 4 supports calls, but the call feature is turned off by default and must be enabled in the soundcore app settings. Calls are not supported in Local Mode.

If you need further assistance, please reach out through the official support channel.