white noise

1. N-UNCOUNT White noise is a continuous "sh" sound, caused by many frequencies of equal intensity. 白噪音; 许多频率不同但强度相等的混合杂音

They were made to listen to white noise, such as static of the sort you might pick up between radio stations. 他们被迫听白噪音，那种类似于调电台时听到的静电噪音。