Simple question dealing with sound waves!?

I'm curious if I'm talking in a low voice to someone and another person gets in between me and this person and talks in an even louder voice, the person I was talking to may have difficulty distinguishing between the different sounds and hearing what it was i was trying to say but is it true that the sound waves will actually interfere with each other rendering sounds distorted where they interfere? for instance if i touch the surface of a still pool of water in one place and then in another at the same time (assuming that sound waves and the ripples in the water work similarly) the ripples will interfere reducing their mass and distorting them. Assuming my assumptions so far are true ( I have very limited scientific knowledge) in that sound waves and ripples in water are the same in that sense etc.. Basically I'm asking if the other persons voice would actually distort the sound waves if they were produced at the exact same time? Also if I were to take a very high frequency sound higher than humans ears are capable of distinguishing rendering this sound while talking would it distort some of the sound waves from my speaking? I hope this makes sense sorry I'm kind of pressed for time. Any help appreciated and ill update the question if you state where exactly it needs more explanation or makes little sense.