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
61
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.
Large pillars and corners may______.
选项
A、make sound rich and full
B、be cures to sound problems
C、be sources of sound problems
D、function as effectively as clouds
答案
C
解析
由末段中的“Large pillars and corners can cause acoustic shadows…using to change thereverberation time of a room”可知,建筑内的柱子和角落因声音需穿过障碍物可能会引起声影,接着又给出了解决办法——在室内悬挂一些反射器,所以柱子和角落是声学问题的来源,故选C。
转载请注明原文地址:https://kaotiyun.com/show/1tQd777K
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
A.RiskofScreeningtoYoungerWomenB.InvestigatingtheEffectofScreeningC.EffectsPredictedbyTwoDifferentMod
A.RiskofScreeningtoYoungerWomenB.InvestigatingtheEffectofScreeningC.EffectsPredictedbyTwoDifferentMod
RobertBeckett,whobrokehislegandhadtohaveitsetatthelocalhospital,wasgivensomethingtoputhimtosleepwhileth
Everyexperienceteachesthepeoplesomethingandtheeffectsarecumulative.
Formanypeopletoday,readingisnolongerrelaxation.Tokeepuptheirworktheymustreadletters,reports,tradepublication
BeesandColourOnourtableinthegardenweputabluecard,andallaroundthisbluecardweputanumberofdifferentgr
"Don’tDrinkAlone"GetsNewMeaningInwhatmaybebadnewsforbarsandpubs,anEuropeanresearchgrouphasfoundthatpe
HowTwoGreatConflictsHelpedtoChangeEuropeNinetyyearsagoonasunnymorninginNorthernFrance,somethinghappenedt
HowTwoGreatConflictsHelpedtoChangeEuropeNinetyyearsagoonasunnymorninginNorthernFrance,somethinghappenedt
随机试题
ThereareagrowingnumberoflanguageimmersionschoolsintheUS.includingonethatwasfoundedinColumbiacalledLaPetite
从本质上讲,企业文化归根结底是一种意识形态,其核心是()
About70millionAmericansaretryingtoloseweight.Thatisalmost1outofevery3peopleintheUnitedStates.Somepeopleg
以下情形中,可以参加执业医师资格考试的是
下列有机物不属于烃的衍生物的是()。
连带责任保证的债务人在主合同规定的债务履行期届满后没有履行债务的,债权人( )。
盈利能力就是公司赚取利润的能力。()
美国心理学家维纳对行为结果的归因进行了系统探讨,并把归因分为三个维度。()
30个人围坐在一起轮流表演节目。他们按顺序从1到3依次不重复地报数,数到3的人出来表演节目,并且表演过的人不再参加报数,那么在仅剩一个人没表演过节目的时候,共报数多少人次?
执行价格随着标的物价格的波动会不断增加,如果价格波动区间很大,就可能衍生出很多的执行价格。标的物价格波动越大,执行价格个数也越多;合约运行时间越长,执行价格越多。()
最新回复
(
0
)