Water eject
A pulsed 165 Hz tone that pushes water out of a wet phone speaker, the same way Apple Watch clears its own. Volume to maximum, speaker facing down, twenty seconds. It clears the speaker grille — it does not dry the rest of the phone.
Start at a low level and raise it gradually — sustained test tones are more fatiguing than music at the same volume.
- 1. Turn the volume up to maximum — the tone only works if the diaphragm moves a long way.
- 2. Hold the phone so the speaker points down, over a towel.
- 3. Press start and leave it to run the full cycle.
Runs for 20 seconds. Press again at any point to stop.
Still muffled?
Try a second cycle at a lower pitch. Smaller speakers sometimes shift water better at 130 Hz, and the deeper tone reaches water sitting further back in the cavity.
Why a low pulsed tone and not just loud music
Water stays in a speaker grille because surface tension holds it in a shallow cavity. Nothing about that is strong — it just needs a push bigger than the water's grip on the walls. The push comes from the diaphragm, and how far the diaphragm travels depends almost entirely on how low the note is: halve the frequency and the excursion for the same sound level roughly quadruples. That is the whole trick. Music averages far higher in pitch and moves the cone much less.
Pulsing matters for a second reason. Each burst starts the diaphragm from rest, and the attack of a fresh burst moves more air than the same tone held continuously. The silent gaps also let an expelled droplet run off the grille rather than getting sucked back on the following half-cycle.
What to do, and what not to
| Do | Don't |
|---|---|
| Run the tone with the speaker facing down | Run it with the phone flat on a table — the water has nowhere to go |
| Wipe the outside dry first | Use a hairdryer — heat pushes moisture further in and can warp adhesive |
| Leave the phone somewhere dry with moving air | Bury it in rice — Apple advises against it, and rice dust gets into ports |
| Wait before charging, if the port got wet too | Blow compressed air into the grille — pressure drives water inward |
| Stop after three cycles if nothing changes | Run it continuously for minutes, which only heats the voice coil |
Honest limits
This clears a speaker cavity. It does not dry a phone. If your device went fully under, the speaker is the least of the problem and the tone finishing successfully can give a false sense that the situation is handled. Modern iPhones are water resistant rather than waterproof, and that rating degrades with age and with every drop the phone has taken.
If sound is still thick after three cycles and the phone was never actually wet, you are probably looking at dust rather than water — a blocked grille sounds very similar. The speaker cleaner cycle is built for that case, and the sound test will tell you whether the speaker itself is still reproducing the full range.
When the speaker is fine and things are just quiet
A clear speaker that still sounds underpowered is usually a limit rather than a fault: a volume cap, loudness normalisation turning tracks down, or a recording that was mastered quietly to begin with. iPhone volume low works through those settings in order, and Volume Booster plays your own files louder than the phone's normal maximum when the recording is the thing holding you back. On Android, how to make Android louder covers the same ground, and the Android app can boost every app that plays media, not just its own player.
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