变,是永远的不变。我们试图用“边缘”与“中心”的概念,来概括大传播时代媒体价值的动态化特征。媒体的价值并非一个静止的概念。社会形态的变革,科技的发展,人们生活方式的演变与受众接受信息的习惯的沿革,都会造成媒体与人群的关系发生变化,从而形成媒体价值的显著变动。当年,广播曾经是一个毫无疑问的中心媒体,但是,随着电视的出现,广播那种缺乏视觉冲击的天然特征变成了不可弥补的缺陷。因此也就逐渐地边缘化,成为一个非主导媒体。而到了今天这个汽车时代,随着人们在车上的时间越来越多,广播的听觉特征 Change, is always the same. We try to summarize the dynamic characteristics of the media value in the era of big spread by using the concepts of “edge” and “center”. The value of the media is not a static concept. Changes in social forms, the development of science and technology, the evolution of people’s life style and the habits of the audience to accept the information will cause the media and the crowd’s relations to change, thus forming a significant change in the media value. In the past, radio was once an undoubted central media, but with the advent of television, the natural feature of broadcasting, lacking visual impact, became an irreparable defect. Therefore, it gradually marginalized and became a non-dominant media. And today in this car era, as people spend more time in the car, the audible features of the broadcast