首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Can You Hear This? When something creates a sound wave in a room or an auditorium(礼堂), listeners hear the sound wave directl
Can You Hear This? When something creates a sound wave in a room or an auditorium(礼堂), listeners hear the sound wave directl
admin
2016-08-16
98
问题
Can You Hear This?
When something creates a sound wave in a room or an auditorium(礼堂), listeners hear 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 comers 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 reflections, 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 effects
B、the types of music orchestras play
C、walls of an auditorium
D、the design of an auditorium
答案
D
解析
本文首先解释了什么是回声,并围绕混响对礼堂建筑构造的影响展开说明,最后又说到建筑内部不合理引起的一些声学问题也可以通过改变构造达到良好的音效。所以全文都在讨论礼堂的设计构造,故选D。
转载请注明原文地址:https://kaotiyun.com/show/QtQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
Thefoodisinsufficientforthreepeople.
HighStressMayDamageMemoryAccordingtoareportissuedinMay1998,elderlypeoplewhohaveconsistentlyhighbloodlevelso
Itisreportedthatonlyapartofpeopleexperienceintheirlife.Whenahormonalreleaseistriggered,itwillreducethepr
Fortunatelytherearestillafewtastythingsforustoenjoyinrelativesecurity.Theirnumbers,however,aredepletedalmost
Inthe1ststudy,studentswhostayuplate______.Mr.Taylorbelievedthatthefindingoftheirstudywouldsoon______.
CollegeNightOwlsHaveLowerGradesCollegestudentswhoaremorningpeopletendtogetbettergradesthanthosewhoareni
FutureKitchenInahouse,thekitchenismostlikelytochangeinthefuture.Therefrigeratormaybeabletotalktotheo
Formanypeopletoday,readingisnolongerrelaxation.Tokeepuptheirworktheymustreadletters,reports,tradepublication
SleepSleepispartofaperson’sdailyactivitycycle.Thereareseveraldifferentstagesofsleep,andtheytoooccurinc
StanfordUniversity1StanfordUniversity,famousasoneofnorthernCalifornia’sseveralinstitutionsofhigherlearning,isso
随机试题
网络营销有哪些主要内容?
为真菌感染的患者进行口腔护理时应选择的漱口液是()
水溶性物质借助细胞膜上的载体蛋白或通道蛋白的帮助进入细胞的过程是
脊柱骨折并发脊髓损伤手术的目的是
依据《环保法》,建设项目的环境影响报告书,必须符合下列哪些情况:
下列哪些内容属于社会公德的内容?()
邓小平理论形成标志是在
如下图所示,3com和Cisco公司的交换机相互连接,在两台交换机之间需传输VLANID为1、10、20和30的4个VLAN信息,Catalyst3548交换机VLANTrunk的正确配置是()。
打开工作簿文件EXCEL.XLSX。将工作表Sheet1命名为“测试结果误差表”,然后将Sheet1工作表的A1:E1单元格合并为一个单元格,内容水平居中;计算实测值与预测值之间的误差的绝对值置“误差(绝对值)”列;评估“预测准确度”列,评估规则为:“
______withlastyear,theoutputofthefactorythisyearhasincreasedbytwentypercent.
最新回复
(
0
)