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
Conversation Music Theory How does the man help the woman understand the meaning of"antinoise"?
Conversation Music Theory How does the man help the woman understand the meaning of"antinoise"?
admin
2013-04-25
73
问题
Conversation Music Theory
How does the man help the woman understand the meaning of"antinoise"?
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、By contrasting music and antinoise
B、By reading a definition from the textbook
C、By describing the sound of a drumbeat
D、By telling her about a computer program
答案
D
解析
The woman asks Antinoise is silence? The man replies Right! And there’s a computer program that proves this. (2.1)
转载请注明原文地址:https://kaotiyun.com/show/5SyO777K
0
托福(TOEFL)
相关试题推荐
SECTION2Questions11-20Questions11-13Completethetablebelow.WriteNOMORETHANTHREEWORDSORANUMBERforeachanswer
SECTION2Questions11-20Questions11-15AnswerthefollowingquestionsusingNOMORETHANTWOWORDSforeachanswer
SECTION1Questions1-10Questions1-4Choosethecorrectanswer,A,B,CorD.
PrairieDogbarkshave______meanings.【35】
PrairieDogbarkshave______meanings.PrairieDogsinArizonaandColoradoappeartospeakdifferent,butmutually-comprehens
Whichattitudeisassociatedwiththefollowingpeopleduringtheconversation?ChooseSIXanswersfromtheboxandwritetheco
Whichattitudeisassociatedwiththefollowingpeopleduringtheconversation?ChooseSIXanswersfromtheboxandwritetheco
随机试题
良性肿瘤不具备以下哪项性质()
初产妇,27岁。妊娠40周,阵发性腹痛10h,宫缩10~15min一次,持续30s,宫口开大2cm若进入第二产程后,胎头+3,胎心90/min,此时的处理应是
下列哪种情况不会引起肾型肾衰竭
野生植物采集证属于()许可证。
对检定、校准、检测结果要实施监控。监控必须___________。
根据规定,保证收益型理财计划的起点金额,人民币在()以上,外币应在()以上。
下列有关期后事项审计的说法中,错误的是()。
截至2011年4月21日22时,沪深两市已有534家上市公司第一季度财报。这534家公司实现营业总收入4572.78亿元,同比增长30.74%;实现净利润336.7亿元,同比增长30.52%。不过,第一季度销售收入和净利润环比则有所下降,其中营业总收人环比
下列对沙尘暴的解释,最准确的一项是______。下列对沙尘暴灾害加剧的原因,表述不正确的一项是______。
A、Theysuffermoreatworkthanathome.B、Complainingaboutworkismoresociallyacceptable.C、Theyarenotsatisfiedwiththe
最新回复
(
0
)