| 摘要 |
A low-noise transmitting/receiving earset or earpiece for use with a cellular mobile telephone includes a housing 1 covered with a grille 12, a speaker 11 mounted inside the housing 1 adjacent to the grille 12 and facing the back side of the housing 1. A first microphone 13 is mounted in the hub 122 of the grille 12 and faces the front side of the housing 1 for picking up resonant sound waves from the external auditory canal A of the user's ear. A second microphone 14 is mounted inside the housing 1 remote from the speaker 11 for receiving voice signals directly from the user's mouth. The sensitivity of the first microphone is lower than that of the second microphone, so preventing echo problems and enhancing voice pick up. A wireless embodiment of the earpiece is described (fig.4). |
