People say I sound muffled, that I'm in a tunnel or there's an echo.

Last Updated: 10/25/2012 7:47 pm

We have found that a small number of people when calling someone who has a LifeProof case on their iPhone have sometimes had difficulty hearing the LifeProof’d talker.


The microphone has a special thin vent that keeps the water out but allows sound to pass. This normally works perfectly and allows crystal clear calls. However, in some instances, air trapped inside the case causes a positive pressure, which can puff the vent outwards, stretching it out to where it touches the little protective grills in the bottom of the case. Sometimes the vent then rests against these grills after being stretched to that position and then cannot vibrate correctly to transmit the sound to the iPhone microphone – causing a distant, thin, tunnel kind of voice to be heard on the other end of a call.

Simple Fix

  • Look at the LifeProof front-on as you would when you are about to start an app. The microphone port is the hole on the bottom of the case to the lower left of the home button and left of the charge port.
  • Blow hard into the microphone for about 3 to 4 seconds. The sufficient effort required is akin to blowing a candle out. You could also pretend you were blowing up a balloon by sealing your lips over the hole and then blowing. 

This air pressure will push the vent away from the protective grills and liberate your iPhone to crystal clear sound on video recording and phone calls again. You may (or may not) need to do this from time to time if large air pressure changes cause the vent to flex and stick to the protective grill again.

Also, remember to always thoroughly shake water out of the vent area after being submerged because trapped water in the protective grill will also weaken the sound.If this doesn't fix the problem, contact LifeProof Customer Support.