If you are facing a low sound in your earbuds: 

• Make sure your headset and the mobile device are within the 10m range to each other
• Low battery level may cause the disconnection from the mobile
• If the battery level is less than 5% charge the Earphones
• If the battery level is more than 5% proceed with the next step

 Note: Visibility of the battery level is subjective and may vary brand to brand.

Increase the volume from your bluetooth device and Noise Airbuds Pro 2

Check for the battery level of the headset

Try with a different music player

 Sound problems may occur due to an issue with the Music player, try playing the same track with a different music player to notice a difference.