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
64
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—sound performance of music such as Wagner operas or Mahler symphonies 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/htQd777K
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
SomeplantsandanimalsdevelopsuperiorcharacteristicssothattheymayWhichofthefollowingisnotdirectlymentioned?
RobertBeckett,whobrokehislegandhadtohaveitsetatthelocalhospital,wasgivensomethingtoputhimtosleepwhileth
RobertBeckett,whobrokehislegandhadtohaveitsetatthelocalhospital,wasgivensomethingtoputhimtosleepwhileth
AssoonasLindawentintothedepartmentthatsoldraincoats,shesensedtherewassomethingunusualintheatmosphere.Fir
Formanypeopletoday,readingisnolongerrelaxation.Tokeepuptheirworktheymustreadletters,reports,tradepublication
IsThereaWaytoKeeptheBritain’sEconomyGrowing?1Intoday’sknowledgeeconomy,nationssurviveonthethingstheydobest
StanfordUniversity1StanfordUniversity,famousasoneofnorthernCalifornia’sseveralinstitutionsofhigherlearning,isso
"Don’tDrinkAlone"GetsNewMeaningInwhatmaybebadnewsforbarsandpubs,anEuropeanresearchgrouphasfoundthatpe
HowTwoGreatConflictsHelpedtoChangeEuropeNinetyyearsagoonasunnymorninginNorthernFrance,somethinghappenedt
随机试题
简述公务员考核的原则。
A.藿香正气散B.玉枢丹C.葛根芩连汤D.香连丸治疗湿热泄泻的主方是
患者男,28岁。O型血,患再生障碍性贫血半年,血红蛋白70g/L,白细胞2.2×109/L,血小板20×109/L。该患者早晨刷牙时发现出血,应立即给予的措施是
下列关于阑尾的描述正确的是
对宫颈黏液结晶描述不正确的是
关于幕墙工程后置埋件(锚栓)施工要求的说法,正确的是()。
下列关于党的领导、人民民主专政和依法治国三者关系的说法中,表述正确的是()。①依法治国的本质是保障人民当家作主②党的领导是人民当家作主和依法治国的根本保证③依法治国是党领导人民治理国家的基本方略④人民当家作主是社会主义民主政治的本质要求
AstheSenatepreparestovoteonlegislationtoempowertheFoodandDrugAdministrationtoregulatetobaccoproducts,itsmemb
输入VB源程序时,若一个命令行中包含两个语句,则两个语句之间的分隔符应使用
若有以下程序#include#defineS(x)(x)*(x)#defineT(x)S(x)/S(x)+1main(){intk=3,j=2;printf("%d,%d\n",S(k+j),T(k+j));}则程序的输出结果是()
最新回复
(
0
)