The present paper discusses the auditory sense characteristics concerning how a human listens to voice signals when they have been eliminated at a specified interval. The authors first clarity the clarity of voice signals when they have been eliminated at a certain interval (called the eliminated voice signals), as well as clarity a sentence understanding degree. As a result, the authors detail the relationship between the elimination cycle of eliminated voice signals and the voice section (or block). Claring on the order of 60% can be obtained up to the voice section on the order of 60%. Furthermore, in the case of a sentence, more than 90% level comprehension can be obtained even if the voice section is at 50%. The authors consider that the basic data for studying the correspondence of a man’s ears to the case for a machine to have ears can be obtained by clarifying these auditory sense characteristics.