60秒科学:Subways Loudest Transit Option in NYC

Subways Loudest Transit¹ Option in NYC
In a report in the American Journal of Public Health performed in New York City, subways were the loudest mass transit option, with potentially hearing-damaging noise levels. Steve Mirsky reports.

[The following is an exact transcript² of this podcast.]

“Stand clear of the closing doors please.” Definitely keep your arms and legs away from the closing doors on the subway. But there’s a potentially more insidious³ danger to your health: the noise.

Mass transit is generally a safe ways to travel, one reason why 33 million Americans use it every weekday. But a study that compared the various modes of mass transit in New York City found that the subways topped all other transit types for average noise, at a grinding 80 decibels⁵. The din⁴ was sometimes worse on the platforms, topping out at 102 decibels. Commuter⁷ trains were much quieter, at about 75 decibels. Remember, that’s on a log scale, so, for example 80 is actually 10 times noisier than 70—and about three times louder than 75. Normal conversation is between 60 and 70 decibels. The study is in the American Journal of Public Health.

The EPA and the World Health Organization recommend daily averages of no more than 70 decibels to protect your hearing. So earplugs may be in order if your particular commute⁶ is literally⁸ deafening⁹.

1 transit   

n.经过，运输；vt.穿越，旋转；vi.越过

参考例句：

• His luggage was lost in transit.他的行李在运送中丢失。
• The canal can transit a total of 50 ships daily.这条运河每天能通过50条船。

2 transcript   

n.抄本，誊本，副本，肄业证书

参考例句：

• A transcript of the tapes was presented as evidence in court.一份录音带的文字本作为证据被呈交法庭。
• They wouldn't let me have a transcript of the interview.他们拒绝给我一份采访的文字整理稿。

3 insidious   

adj.阴险的，隐匿的，暗中为害的，（疾病）不知不觉之间加剧

参考例句：

• That insidious man bad-mouthed me to almost everyone else.那个阴险的家伙几乎见人便说我的坏话。
• Organized crime has an insidious influence on all who come into contact with it.所有和集团犯罪有关的人都会不知不觉地受坏影响。

4 din   

n.喧闹声，嘈杂声

参考例句：

• The bustle and din gradually faded to silence as night advanced.随着夜越来越深，喧闹声逐渐沉寂。
• They tried to make themselves heard over the din of the crowd.他们力图让自己的声音盖过人群的喧闹声。

5 decibels   

n.分贝( decibel的名词复数 )

参考例句：

• The typical lawn mower makes about 90 decibels of noise. 典型的割草机发出的声响约为90分贝。 来自《简明英汉词典》
• A normal conversation reaches 55 decibels. 普通的谈话即可达55分贝。 来自《简明英汉词典》

6 commute   

vi.乘车上下班；vt.减(刑)；折合；n.上下班交通

参考例句：

• I spend much less time on my commute to work now.我现在工作的往返时间要节省好多。
• Most office workers commute from the suburbs.很多公司的职员都是从郊外来上班的。

7 commuter   

n.(尤指市郊之间)乘公交车辆上下班者

参考例句：

• Police cordoned off the road and diverted commuter traffic. 警察封锁了道路并分流交通。
• She accidentally stepped on his foot on a crowded commuter train. 她在拥挤的通勤列车上不小心踩到了他的脚。

8 literally   

adv.照字面意义，逐字地；确实

参考例句：

• He translated the passage literally.他逐字逐句地翻译这段文字。
• Sometimes she would not sit down till she was literally faint.有时候，她不走到真正要昏厥了，决不肯坐下来。

9 deafening   

adj. 振耳欲聋的, 极喧闹的 动词deafen的现在分词形式

参考例句：

• The noise of the siren was deafening her. 汽笛声震得她耳朵都快聋了。
• The noise of the machine was deafening. 机器的轰鸣声震耳欲聋。