首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
下面有 3 篇短文,每篇短文后有 5 道题。请根据短文内容,为每题确定 1 个最佳选项。 Can You Hear This ? When s...
下面有 3 篇短文,每篇短文后有 5 道题。请根据短文内容,为每题确定 1 个最佳选项。 Can You Hear This ? When s...
admin
2020-12-24
29
问题
下面有 3 篇短文,每篇短文后有 5 道题。请根据短文内容,为每题确定 1 个最佳选项。
Can You Hear This ?
When something creates a sound wave in a room or an auditorium (礼堂) , listener shear the sound wave directly from the source. They also hear the reflections as the sound bounces off the walls, floor, and ceiling. These are called the reflected wave or reverberant (反射的) sound, which can be heard even after the sound is no longer coming from the source.
The reverberation time of an auditorium is determined by the volume or interior size of the auditorium. It is also determined by how well or how poorly the walls, ceiling, floor, and contents of the room (including the people) absorb sound. There is no ideal reverberation time, because each use of an auditorium calls for different reverberation. Speech needs to be understood clearly; therefore rooms used for talking must have a short reverberation time. The full-sound performance of music such as Wagner operas or Mahler symphonies should have a long reverberation time. The light, rapid musical passages of Bach or Mozart need a reverberation time somewhere between.
Acoustic problems often are caused by poor auditorium design. Smooth, curved (弯曲的)reflecting surfaces create large reflections. Parallel (平行的)walls reflect sound back and forth, creating a rapid, repetitive pulsing (有节奏的跳动) effect. Large pillars (柱)and
corners can cause acoustic shadows as the sound waves try to pass around the object. Some of these problems can be solved by using absorbers and reflectors to change the reverberation time of a room. For example, hanging large reflectors, called clouds, over the performers will allow some sound frequencies to reflect and others to pass to achieve a pleasing mixture of sound.
This passage is mainly about
选项
A sound waves and their acoustic effect.
B the types of music orchestras play.
C walls of an auditorium.
D the design of an auditorium.
答案
A
解析
转载请注明原文地址:https://ti.zuoweng.com/ti/frlQKKKQ
相关试题推荐
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 TheToughGrassth...
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 TheToughGrassth...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段,每段选择1个最佳标题;(2)第27~30题要求从所给的6个选项中为每...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段,每段选择1个最佳标题;(2)第27~30题要求从所给的6个选项中为每...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段,每段选择1个最佳标题;(2)第27~30题要求从所给的6个选项中为每...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段,每段选择1个最佳标题;(2)第27~30题要求从所给的6个选项中为每...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段,每段选择1个最佳标题;(2)第27~30题要求从所给的6个选项中为每...
随机试题
下列各项不属于申请国家助学贷款需要提交的材料的是( )。 A.借款人有效
婴儿早期佝偻病的可靠诊断指标是 A.多汗 B.睡眠不安、夜惊 C.血钙低下
用于医疗器械灭菌的消毒剂,进行鉴定试验时应选择的微生物实验项目是 A.细菌芽胞
下列各项中,不会影响流动比率的业务是()。
(2014年)下列交易事项中,会影响企业当期营业利润的有( )。
痰液标本做细胞学检查应留何时的标本为好
下列选项中,关于法律儒家化表现的说法,正确的是( )。A.汉朝法律的儒家化,不仅体现在刑罚执行和审判上,也体现在刑法适用原则上B.春秋决狱作为法律儒家化的表
下列关于光污染的表述,哪项是错误的()A:钢化玻璃反射的强光会增加白内障的发病率B:镜面玻璃的反射系数比绿草地约大十倍C:光污染误导飞行的鸟类,危害其生存
整个投资规划的流程正确的是()。A:客户分析——资产配置——证券选择——投资实施——投资评价B:资产配置——客户分析——证券选择——投资实施——投资评价C:
下列情形中,属于直接向环境排放污染物从而应缴纳环境保护税的是()。A.企业在符合国家和地方环境保护标准的场所处置固体废物的B.事业单位向依法设立的生活垃圾集