2019-2020学年英语人教版选修8课件:UNIT 5 晨读晚诵 .pptx
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1、Unit 5Meeting your ancestors古文物中蕴含着过去人们丰富的生活,吸引着科学家们对它们进行各种各样的研究和揣摩。那么,一件古老的乐器又能透视给人们什么样的丰富内涵?科学家们又会对它做出怎样的研究呢?The well-preserved,nicely decorated conch1 shells found in Peru offered researchers a rare opportunity to look into primitive instruments.Researchers put their lips to ancient shells to fig
2、ure out how humans used these trumpets 3,000 years ago.Polished,painted and carved with symbols,the shells had well-formed mouthpieces2 and V-shaped cuts.The cuts may have been used as a rest for the players thumb or to allow the player to see over the instrument while playing.To record the sounds a
3、nd understand the occasion in which the instruments,called pututus,were played,researchers asked a shell musician to blow into the horn.They recorded the sounds path through four small microphones placed inside the players mouth,the shells mouthpiece,the shells main body and at the shells large open
4、ing,or the bell.The team used signal-processing software to analyse the acoustic3 features of each trumpet.Following the sounds path made it possible to reconstruct the ancient shells interior4 without damaging it.They also wanted to know how the sites ceremonial5 stone room changed the trumpets sou
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