Czyszczenie Głośnika ("speaker cleaning") is a free Polish web tool that plays a tone to help push water droplets or loose dust out of a phone speaker. Modes: Water (pulsing 165 Hz, 60 s), Dust (120 to 1200 Hz sweep, 60 s), Deep (90 s cycle) and Custom frequency, with vibration on Android. The site also has left and right speaker tests, headphone and microphone tests, and guides.
The sound is generated live in the browser, so there is nothing to install and no account. It is free. It does not repair a damaged speaker, which needs a repair shop. The interface is in Polish only.
Phone speakers often sound muffled after getting wet or dusty, and people look for a quick, free way to help push water and dust out. We built a simple browser tool with no install or sign-up that plays a tone for that purpose, and added speaker, headphone and microphone tests alongside it.