phone

phone

1. telephone 的縮寫
2. a speech sound

-phone：指 voice, sound, to speak, say, tell，表示聲音、傳遞聲音的裝置

microphone：麥克風
earphone (塞入式耳機, in-ear speaker)
headphone (頭戴式或耳罩式耳機)
headset (headphone 或 earphone 再加麥克風)
Door Phone 門口機
Inter Phone 室內機
interphone 對講機
cellular phone (cellphone, cell-phone, mobile phone)
saxophone
xylophone

比較

• speaker (loudspeaker) 喇叭
• speaker、headphone、line out 有何不同？

BTL ([bridge-tied load](https://en.wikipedia.org/wiki/Bridge-tied_load)) speaker
Ear speaker
Line out
AC-coupled headphone output
DC-coupled headphone output
BTL loudspeaker output
headset
BTL ear speaker
single-ended ear speaker