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There's nothing that sends the stomach up into the throatquite as effectively as a sudden, unexpected loud noise at close range.
胃氣上行至喉嚨最明顯的表現就是從喉嚨附近發出一聲大響，很突然，讓人猝不及防
Counted in this category of shocking sounds is the accidental popping of a balloon or the forcefulsmashing of an air-filled paper bag.
類似這種具有震撼力的響聲還有氣球突然爆裂或用力打破一個充滿空氣的紙袋時發出的聲響。
But why are these things so loud?
但是，為什么這些東西會發出這么大響聲呢？
It makes sense that themetal-on-metal clash of banging cymbals creates a racket, but air, paper and latex? What gives?
像銅鈸那樣金屬間互相碰撞產生的響聲還講得通，但空氣、紙和橡膠怎么會發出這么大的響聲？是什么讓它們作響呢？
As most of us know from elementary school science class, sound travels in waves.
我們從小學科學課上就學過，聲音是以波的形式傳播的。
Morespecifically, sound consists of waves of pressure transmitted through the air to the ears.
說的具體些，由壓力波組成的聲音通過空氣傳到人耳。
When asound wave hits the ear it signals a change in pressure to the inner ear.
聲波撞擊人耳后會向內耳發送一個壓力改變的信號。
A sensitive instrument, theinner ear can detect minute changes in pressure and interprets these changes as sounds.
內耳就像一部精密儀器，可以探測到壓力的微小變化并把這些變化轉換成聲音。
Sologically, the higher the change in pressure, the louder the sound.
因此，從邏輯上講，壓力變化越大，聲音就越大。
If we think about the air inside a balloon or paper bag as a large, contained pressure wave, thenthe puzzle begins to make sense.
如果我們把氣球或紙袋里的空氣想成一個巨大的充滿壓力波的容器，那么這個謎就可以解開了。
Both balloon and paper bag contain pressurized air pushing outagainst the sides.
氣球和紙袋里都含有帶壓空氣，這些空氣向四周接觸面上施壓。
When the balloon pops or the bag is compressed, the pressurized air rushes out all at once in apowerful wave.
等到氣球破了，袋子癟了，帶壓氣體就立刻以強力波的形式向外沖出。
Think of an ocean wave.
這讓我們想到了海浪。
The larger the wave, the more powerfully it crashes intothe surf.
波浪越大，拍岸就越有力。
When the highly pressurized wave from a popped balloon or bag hits the ear, the innerear translates the sudden increase in pressure as a loud, ringing pop.
從氣球或袋子里沖出的高壓波撞擊到人耳時，內耳就把這種突然升高的壓力轉換成一聲巨大、響亮的爆破聲。
