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
69
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.
Wagner operas and Mahler symphonies sound with full-sound effect have______.
选项
A、a short reverberation time
B、a long reverberation time
C、an intermediate reverberation time
D、no reverberation time
答案
B
解析
由第二段中的The full一sound performance of music such as Wagner operas or Mahlersymphonies should have a long reverberation time可知,瓦格纳的歌剧和马勒的交响曲听起来立体圆润是因为混响时间长,故选B。
转载请注明原文地址:https://kaotiyun.com/show/cBLd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
OptimistsReallyDoLiveLonger,SayScientists1.ForthephilosopherArthurSchopenhaueroptimismwasfundamentallywrongb
IstheNewsBelievable?Unlessyouhavegonethroughtheexperienceyourself,orwatchedalovedone’sstruggle,youreallyh
AWondersMadebyOurSickbutCharmingLittleGirlBHelpingaDoctortoSucceedCHeartsSaddenedbyaRareDisorderofOur
Shecouldfixmachinewithoutreferringtotheinstructions.
GeologyandHealthTheimportanceofparticularmetalsinthehumandiethasbeenrealisedwithinthepastfewdecades,and
AttentiontotheDetails1.Attentiontodetailissomethingeveryonecanandshoulddo--especiallyinatightjobmarket.BobCr
Someplantsandanimalsdevelopsuperiorcharacteristicssothattheymay______.Whichofthefollowingisnotdirectlymentio
CanYouHearThis?Whensomethingcreatesasoundwaveinaroomoranauditorium(礼堂),listenershearthesoundwavedirectl
随机试题
素月分辉,明河共影,_________。(张孝祥《念奴娇.过洞庭》)
某厂房的纵向天窗宽8m、高4m,采用彩色压型钢板屋面、冷弯型钢檩条、天窗架:檩条、拉条、撑杆和天窗上弦水平支撑局部布置简图如题图中的图(a)所示:天窗两侧的垂直撑如图(b)所示,工程中通常采用的三种形式天窗架的结构简图分别如图(c)、(d)、(e)所示。所
根据FIDIC((施工合同条件》,在预付款起扣点后的工程进度款支付时,按本期承包商应得的金额中减去后续支付的预付款和应扣保留金后款额的(),作为本期应扣还的预付款。
发票的使用要求包括()。
少壮不努力,老大徒伤悲:惜时:奋斗
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
Musicproducesprofoundandlastingchangesinthebrain.Schoolsshouldaddmusicclasses,notcutthem.Nearly20yearsago,a
Whatdoesthemanmean?
Whenwasthecustomersurveyconducted?Itwasconducted______.WhenshouldtheCustomerServiceDepartmentcomeupwithapla
TheHealthBenefitsofDrinkingWater—Isbottleddrinkingwaterhealthierthanfilteredtapwater?[A]Waterisakeyin
最新回复
(
0
)