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2. 中耳肌肉
Dampen v. 1. To make something slightly wet; 2. To make something such as a feeling or activity less strong; 3. To make a sound or movement less loud or strong.
Fatigue n. 1. Very great tiredness; 2. Metal fatigue金属疲劳
Attenuate v. To make something weaker or less.
Vertebrates n.脊椎动物
【引入现象】
P1:现代社会中有很多噪音人耳的noise-reduction system: muscles, ossicles
【现象解释】
P2:人耳的noise-reduction system原理:contract reflexively loud external sounds
P3:原理:减弱人自身说话的声音 before a person vocalizes
P4:中耳肌肉的其他作用:说话的时候能听到别人讲话
【总结延伸】
P5:鸟的hearing and sound system
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