Speaker Test: Stereo Check

Speaker Test checks every built-in speaker of your iPhone or iPad in under a minute. SPEAKER CHECK Play a tone on each speaker one by one, answer "heard it" or "didn't hear", and see the result: "2 of 2 speakers work". iPhone has two speakers, the bottom speaker and the earpiece at the top; a weak or silent one is easy to spot. STEREO LEFT / RIGHT Play a tone on the left, the right or both speakers and hear whether each side works on its own. WATER EJECT Pulses of a low 165 Hz tone make the speaker membrane vibrate, which can help push water and dust out of the grille after your phone gets wet. MORE TESTS • Basic tones: A4 440 Hz and a vocal-range tone • Advanced tones: bass, treble, white noise, square wave, custom frequency • Frequency sweep from 20 Hz to 20 kHz: find where the sound stops • Output devices: see where the sound goes (speaker, headphones, Bluetooth, AirPlay) • Warnings…