视听率调查 meaning in Chinese

audience rating survey

The actual number of individuals in different demographic groups who have returned usable information to the ratings company
向视听率调查公司提供有用信息的具有不同人口特征的个人的实际数目
In television , a 4 - week period during which ratings companies are collecting the audience information necessary to produce local market reports
指视听率调查公司为准备地区市场报告而进行的为期4周的观众信息收集调查