音响革命 二十年代中随着美国社会的日趋繁荣,各种娱乐业间的相互竞争使影院观众的人数锐减。由于拥有汽车的家庭越来越多,到郊外兜风要比下午看电影的吸引力更大。从1921年开始的商业性无线电广播到了二十年代后期深入美国每一个家庭,把免费娱乐送进家中的起居室。尽管这看上去是一桩好事,但却使电影业 Acoustic revolution In the 1920s, with the growing prosperity of American society, competition among various entertainment industries drastically reduced the number of cinema audiences. With more and more families with cars, going around the countryside is more appealing than watching movies in the afternoon. Commercial radio broadcasts from 1921 went into every family in the United States in the late 1920s to deliver free entertainment to the living room in the home. Although this may seem like a good thing, it has made the film industry