How does the ringing sound of a telephone travels from the phone to your ear

Sound produced by a vibrating object reaches our ear through sound waves which propagate through the medium as a series of compression and rarefaction.Auditory receptors receptors receive vibrations from telephone and they are passed to ear drum which then passes it auditory ossicles which then passes it to fluid of cochlea which then basilar membrane and then finally it reaches to hair cells. Then the sound is heard

Sound waves travel through the air to your eardrum

Divide 108.2 x 10^6 into 1.5 x 10 and the result will be in au (astronomical units)

If you are a plato user the answer would be "a decrease in the overall volume of gases" i just completed the test and this was the answer. hope it ! (: