| 摘要 |
An earphone system for a mobile phone includes a jack coupled to the mobile phone, a speaker electrically connected to the jack, and a microphone electrically connected to the jack. The speaker and the microphone are inserted in one end of a nonconductive communication tube. The communication tube comprises a receiving tube for transmitting sound from the speaker to a user's ear and a transmission tube for transmitting user's transmission sound to the microphone. |
