Identify the phone and the affected opening
Remove the case and find which speaker is actually muffled: the lower loudspeaker, top earpiece or both. Do not assume every hole is a speaker; microphones often sit near the same edge.
Place the affected speaker downward over a lint-free cloth. Keep the USB-C connector unobstructed and disconnected from power.
Confirm audio is not routed elsewhere
Android phones can continue sending media to Pixel Buds, cars, smart speakers or another Bluetooth accessory. Use the media output control or disconnect Bluetooth before starting the sound.
If the nBeats player is silent but another device makes noise, the tool is working—the output route is wrong.
Choose the closest nBeats route
The Android page separates Google Pixel, OnePlus, Xiaomi/Redmi, Nothing Phone, OPPO/realme, Motorola, vivo and Other Android. Each selection loads a different 1:36 nBeats sound and restarts at 00:00.
These are practical sound choices, not laboratory tuning from the manufacturers. Begin at a moderate level and stop if the built-in speaker distorts sharply.
Retest before assuming damage
Let the phone rest, then compare spoken audio, a phone call and the nBeats speaker test. If only one app is affected, check that app’s volume and output settings.
Persistent crackling, heat, charging warnings or power instability needs the phone maker’s support or a qualified technician.
Device-specific safety statements are linked to current manufacturer guidance and independent reporting.
Google Pixel: water-damage prevention and responseGoogle Android: Bluetooth audio troubleshooting