People use their hearing as a method of distance measurement. And this happens on an unconscious level. We are talking about the delay between the formation of the sound wave and when this wave to reach the human ear. This usually occurs within a few milliseconds.
This information we are inclined to trust along with vision. Scientists believe that hearing plays a major role in the perception of the world and evaluating what is happening.
"Our research clearly demonstrate the fact that the estimation of the relative distance to the object is most accurate when the visual data are supported by crisp sound signals" - commented the results of the study of Dodge Tadin, one of the authors of scientific work. The data indicate that the human brain perceives sound signals at intervals not exceeding 40 milliseconds.