一个人长时间呆在这样的地方,听觉是否会下降不清楚,因为估计在听力下降以前,一个正常人应该已经疯掉了。但确实有这么一个人,在1951年造访了哈佛大学的消音室之后说到,"I heard two sounds, one high and one low. When I described them to the engineer in charge, he informed me that the high one was my nervous system in operation, the low one my blood in circulation."[1]