5️⃣Does a 30,000 Hz speaker cleaner sound really work?
Not in the way it is often advertised. A true 30,000 Hz (30000 Hz) tone is above the normal range of human hearing, and most phone speakers are not designed to reproduce it effectively. To eject water, the speaker membrane needs to move strongly, which lower audible frequencies generally do better. That is why FixMySpeakers uses 165 Hz tones and frequency sweeps instead of an ultrasonic 30,000 Hz sound.