Why people in helicopter usually wear...
2008-02-23 10:10 pm
I am ambiguous that why people in the helicopter usually wear a kind of Ear Protector or headphone during the flying. However, what are the actual functions of it?
回答 (1)
2008-02-24 4:11 am
✔ 最佳答案
rotation of propellors make a helicopter move. but the rotation of propellors is very noisy.
so ear protector can protect the ear from damage.
收錄日期: 2021-04-13 15:11:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080223000051KK01956