只用一本书提高英语听力能力!重温经典名著双语阅读小编推荐:跟着纪录片学英语不背单词和语法,轻松学英语
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[万花筒] 【整理】2013-03-15&03-17 高分贝耳机——听力杀手

提高英语听力能力 找对方法很重要!
HW

Stories are affecting every American family, here is the question. Are your ear phones ruining your hearing? Right now tonight, our millions of millions of American are walking around and listening to the music but ensuring there will not be able to hear as well in the years ahead. Tonight the mayor of New York, says it’s time to set out alarms, ABC’s chief medical editor Doctor Rigid Beseer is stepping in.
30 years ago, people in their 20s could all hear the rustle of the leaves. The drip of rain drop, the babble of the children, now for one in five of them, those sounds were gone forever, normally people were coming in their 50s or 60s with hearing loss, and that now has shifted into people in their 30s and 40s. In fact, Doctor  George Alexiades  has to tell more and more teens, their high peach hearing is already gone.
Designer headphones is a big business, high ticket must haves. But for hearing loss, ear buds may be the most destructive.
Some context: music devices can produce about 115 decibels of sound, ear buds at 5 decibels more. 85 decibels is where hearing damage starts. Power tools, 98 decibels. A lawn mower, 107.  A jet taking off 100 feet away, 140. So how loud is the music? I went out with a decibel meter.
Here is what happened inside your ear. When strong sound vibration hits your ear,the problem deep inside your cochlea are fragile hear cells. They turn vibrations into sound messages to the brain. Blast the mood loud sounds, and some wither. If the loud sound is brief, they will recover. But it last too long and happens so often, they dies and they never grow back.
If you get 100 decibel, I will limit that to about one hour a day. My advice, never go higher than three quarters of your top volume and a couple of hours is enough.
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