| 摘要 |
<p>The mobile telephone includes two transducers (30,30) connected to the two opposite faces of a printed circuit board (100). Each transducer includes a vibrating membrane resonating in front of a rear cavity. The rear cavities of the two transducers communicate via orifices (101) formed in the printed circuit board, such that the rear resonant cavities (32) are linked together. The structural arrangement for a radio communication device or mobile telephone comprises a box (10) within which there is a first sound transducer (30) serving as a microphone, and a second sound transducer (30) serving as a loudspeaker. The two transducers (30,30) are connected to the two opposite faces of a printed circuit board (100). Each transducer includes at least one vibrating membrane resonating within a front acoustic cavity, whilst also having a rear cavity. The rear cavities of the two transducers communicate via orifices (101) formed in the printed circuit board, such that the rear resonant cavities (32) are linked together. The radio also includes a patch aerial (40) connected to the printed circuit board, also defining a cavity between an earth plane and a conductive chip.</p> |
