head·phone /ˈhɛdˌfon/
戴在頭上的收話器,雙耳式耳機
headphone
耳機
headphone
n : electro-acoustic transducer for converting electric signals
into sounds; it is held over or inserted into the ear;
"it was not the typing but the earphones that she
disliked" [syn: earphone, earpiece, phone]