单项选择题

Commercials create the sensation of loudness because ________.

A．TV stations always operate at the highest sound levels
B．their sound levels are kept around peak levels
C．their sound levels are kept in the middle frequency ranges
D．unlike regular programs their intensity of sound varies over a wide range
<上一题 目录 下一题>
热门 试题

单项选择题
In the passage, the author is trying to tell us ________.
A．how TV ads vary vocal sounds to attract attention
B．how the loudness of TV ads is overcome
C．how advertisers control the sound properties of TV ads
D．how the attention-getting properties of .sounds are made use of in TV ads
单项选择题
One of the reasons why commercials are able to attract viewer attention is that ________.
A．the human voices in commercials have more auditory impact
B．people like cheerful songs that change dramatically in sound quality
C．high-frequency sounds are used to mask sounds that drown out the primary message
D．they possess sound qualities that make the viewer feel that something unusual is happening
相关试题