首页
登录
职称英语
Conversation Music Theory[img]2012q1/ct_etoefm_etoeflistz_0641_20121[/img] [br]
Conversation Music Theory[img]2012q1/ct_etoefm_etoeflistz_0641_20121[/img] [br]
游客
2024-01-04
38
管理
问题
Conversation Music Theory
[br] According to the conversation, what is noise?
W: Welt, I don’t know about you, but I’m totally confused about today’s lecture, especially the part about music and noise.
M: It’s not so bad, really. I think I got most everything in my notes.
W: So then ... what is the difference between music and noise? Professor King said noise is a random sound, but then he said the sounds of a cymbal and a drumbeat were examples of noise. I’d say they’re examples of music—since they’re sounds made by musical instruments! What do you think he meant?
M: OK. Do you remember how he said that noise is a random sound?
W: Uh-huh.
M: Well, it’s a random sound that has irregular sound waves.
W: But how’s a sound that’s noise different from a sound that’s music?
M: Well, if you could take a picture of a musical note, you’d see that it has regular waves that repeat themselves. That’s because music is a sound that’s in a pattern we can hear or discern. Noise is different from music because it doesn’t have a pattern.
W: But why is the sound of a drumbeat noise instead of music? Isn’t a drumbeat a note? And then ... so ... doesn’t it have a regular pattern of waves?
M: Maybe you’re taking what he said too literally. Maybe he meant a drumbeat is as close as a musical instrument can get to making just noise.
W: Maybe a single drumbeat is like a word spoken out of context. A single word with no context is just noise!
M: Now there’s a thought!
W: The other thing I didn’t get was what he said about antinoise. First noise, then antinoise? What do you think he meant?
M: Think of it as the opposite of noise. It’s like—wait, let me back up. Sound has waves, right?
W: Right.
M: Well, we can describe these waves as "in phase" or "out of phase" with each other. "Out of phase" means reversed.
W: Uh-huh.
M: If you add two out-of phase waves together at the same frequency, the result is antinoise—silence.
W: Antinoise is silence?
M: Right! And there’s a computer program that proves this. A microphone picks up the sound and sends it back to the computer, and then the computer reads the waves and makes sort of a mirror image, or a reverse copy of the wave. Then you can play it back against the original sound, and when the two waves meet, they sort of overlap each other ... exactly at the high and low peaks. This eliminates the sound, creating zero sound—antinoise.
W: How do you know all this? Professor King didn’t talk about this.
M: It’s all in our book. Didn’t you do the reading?
W: No, I didn’t have time. I guess I’d better do that now.
M: Yeah, you should. But it’s better to do the reading before the lectures ’cause then you’ll have a better idea of what he’s talking about.
W: Yeah, you’re right. I guess I have some catching up to do.
选项
A、The complete absence of sound
B、Patterns produced by sounds in nature
C、Random sound with irregular waves
D、Sounds made by a computer voice
答案
C
解析
The man says Do you remember how he said that noise is a random sound?; Well, it’s a random sound that has irregular sound waves. (2.2)
转载请注明原文地址:https://tihaiku.com/zcyy/3332167.html
相关试题推荐
Whichattitudeisassociatedwiththefollowingpeopleduringtheconversation?
Whichattitudeisassociatedwiththefollowingpeopleduringtheconversation?
NarratorListentoapartofaconversationinanoffice.[img]2011q1/ct_etoe
NarratorListentoapartofaconversationinanoffice.[img]2011q1/ct_etoe
NarratorListentoapartofaconversationinanoffice.[img]2011q1/ct_etoe
NarratorListentoapartofaconversationbetweenastudentandaprofessor
NarratorListentoapartofaconversationbetweenastudentandaprofessor
NarratorNowlistentoaconversationbetweentwostudents.[img]2011q1/c
NarratorListentoalectureintheliteratureclass.[img]2011q1/ct_etoefm_
NarratorListentoalectureintheliteratureclass.[img]2011q1/ct_etoefm_
随机试题
Forthispart,youareallowed30minutestowriteashortessay.Youshouldsta
BaruchSpinozawasaDutchphilosopherandreligiousthinkerwhowasbornonN
Thiswasthecapital’smostanxiousweeksinceSeptember11th.OnMondayth
ThereareagrowingnumberoflanguageimmersionschoolsintheUnitedStat
[originaltext]I’mHelenWartman,DirectoroftheWartmanSportsAcademy,a
Internetuseappearstocauseadeclineinpsychologicalwell-being,accordi
质押合同是从质物移交给质权人占有之日起生效。( )
一间房屋的长、宽、高分别是6米、4米、3米,施工队员在房屋内表面上画一条封闭的线
在下列行为中,属于预警行为的是A:戒烟 B:积极锻炼 C:意外事故自救 D
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)