今天前程百利小编为大家分享的是托福听力的学习技巧。备考托福听力就要把听力文本吃透分析彻底。这样不仅能积累背景材料，还能把听力的专业词汇积累起来一块背诵。下面就跟小编一起学习最新科技橡胶薄膜让飞机飞行更加安静这篇听力文本。
Engineers devised a latex-laced honeycomb material that could make an airplane cabin sound more like a quiet living room. Christopher Intagliata reports
Unless you have a pair of noise-canceling headphones, flying can be annoying to the ears. A lot of low-pitched rumbling makes it into the cabin. Problem is, the wings, floors, ceilings and bulkheads are lined with a lightweight material with a honeycomb structure—which adds structural integrity to the aircraft—but engine and airflow sound cuts right through.
"The physical law says that the lighter the material is, the worse it can block sound." Yun Jing is an acoustician at North Carolina State University.
In a quest for quiet, he and his colleagues constructed a similar material—but with a quarter-millimeter thin layer of latex stretched across the cells of the honeycomb. In tests, the latex-laced structure cut the intensity of low-frequency rumbling to a thousandth of its previous level—enough, he says, to make an airplane cabin sound more like a peaceful living room.
Problem is, the material Jing developed is six percent heavier than the standard stuff. And more weight means more fuel means more expense. But if we settled for a slightly quieter flight, Jing says he could use less latex, making the noise-blocking honeycomb just a few percent heavier. Considering that the honeycomb is already one of the lightest parts of an airplane, you’re then looking at only a modest plane weight gain.
Of course, that's assuming everyone wants a quieter plane. "Some people say they actually want to hear the sound of the engine. They don't want the cabin to be too quiet. They want to make sure the plane is still flying." Sounds like you’ll need those expensive headphones a little while longer.
疑难词汇：
Devise vt. 设计;想出;发明;图谋;遗赠给n. 遗赠
latex-laced 乳胶花边的
cabin 小屋
headphone n. 双耳式耳机;头载数话器;戴在头上的收话器
low-pitched 低调的;低沉的
rumbling n. 隆隆声;辘辘声
ceilings n. [建] 天花板(ceiling的复数)
bulkhead n. 隔板;防水壁
integrity n. 完整;正直;诚实;廉正
acoustician n. [声] 声学家
structural integrity 结构完整性
quieter n. 消音装置;消声器adj. 更安静的(quiet的比较级)
长难句解析：
1. In tests, the latex-laced structure cut the intensity of low-frequency rumbling to a thousandth of its previous level—enough, he says, to make an airplane cabin sound more like a peaceful living room.
难句类型：
插入语
句子主干：
the latex-laced structure cut the intensity of low-frequency rumbling
难句拆分：
he says 是插入语成分，to a thousandth of its previous level—enough介宾短语，
2. But if we settled for a slightly quieter flight, Jing says he could use less latex, making the noise-blocking honeycomb just a few percent heavier.
难句类型：
If引导的条件状语从句
句子主干：
Jing says he could use less latex
难句拆分：
if we settled for a slightly quieter flight ，If引导的条件状语从句
making the noise-blocking honeycomb just a few percent heavier，修饰成分修饰latex;
文本结构特点：
本篇文章主要讲的是经过研究新型薄膜能够帮助帮助飞机实现静音的效果。主要是因为这些橡胶膜可以反弹噪音。
好了，以上就是前程百利小编为大家整理的备考托福听力文本的学习。大家要把这些最接近听力背景材料的文积累起来。希望能在备考托福的路上助大家一臂之力。预助大家取得好成绩。
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