Unmuffle: Speaker Cleaner

Unmuffle helps when your iPhone speaker sounds muffled after getting wet or dusty, and doubles as a decibel meter and tone generator. Speaker Cleaner • Water mode plays a steady 165 Hz tone that vibrates water out of the speaker grille. • Dust mode sweeps from 60 to 1,000 Hz to shake loose dust and lint. • 30 second, 1 minute or 2 minute runs, with a gentle vibration. • Warns you if headphones or a Bluetooth speaker are connected. Decibel Meter • See how loud it is around you, with average and peak levels and a live chart. • Labels from "very quiet" to "dangerous" so you know when to protect your hearing. • Calibrate against a reference meter if you have one. Tone Generator • Any frequency from 20 Hz to 20 kHz, with quick presets. • Play through the left, right or both channels to test speakers and headphones. Unmuffle can help with water and dust, but it can't repair a damaged speaker. Decibel readings are estimates from your iPhone's microphone. No account, no tracking; sound is never recorded.