高音调的噪音可以压迫和潜在损伤内耳微毛细胞，噪音转化为机械振动，或声音，或电信号，在大脑再转化为声音。
Loud sounds can stress and potentially damage delicate hair cells in the inner ear that convert mechanical vibrations, or sound, to electrical signals that the brain interprets as sound.
一些其他的国家，比如意大利和日本，人们用心电图（ECG或EKG）给年轻人做检查，心电图记录了心脏发出的电信号。
Some countries, such as Italy and Japan, screen young people with the use of an electrocardiogram (ECG, or EKG), which records the electrical signals present in the heart.
探针的后端的电线连接到电脑，将电信号翻译成心跳图、脑波图或其它什么。
Wires attached to the back of the probe lead to a computer that translates the electrical signals into a picture of the heartbeat, brainwave or whatever.
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