If you still had air in your lungs and yelled directly into someone else's ear with your dying breath, it may still be audible to the other person. However, your mouth must completely encapsulate the other person's ear to prevent the air gases from instantly vaporizing into tiny liquid droplets and ice crystals. Furthermore, the air bubble exhaled from your mouth into their ear will be traveling far slower than the speed of sound, so the sound waves will have bounced around the bubble quite a bit before reaching their eardrum, causing your yell to sound muffled, but possibly still intelligible.