Structural arrangement for a radio communication terminal incorporating a loudspeaker and an earpiece
View Patent ↗In a structural arrangement for radio communication terminals comprising a casing in which are disposed at least a first sound transducer having an earpiece function and a second sound transducer having a loudspeaker function, the two transducers being respectively connected to two opposite faces of a printed circuit card, and each transducer comprising at least one resonating membrane vibrating in a front acoustical cavity and a rear acoustical cavity. The rear acoustical cavities of the transducers communicate with each other via orifices formed in the printed circuit card to form a twin rear acoustical cavity.
1. A structural arrangement for radio communication terminals comprising a casing in which are disposed at least a first sound transducer having an earpiece function and a second sound transducer having a loudspeaker function, the two transducers being respectively connected to two opposite faces of a printed circuit card, and each of the transducers comprising at least one resonating membrane vibrating in a front acoustical cavity and a rear acoustical cavity, in which structural arrangement the rear acoustical cavities of the transducers communicate with each other via orifices formed in the printed circuit card to form a twin rear acoustical cavity.
2. The structural arrangement claimed in claim 1 wherein, the terminal further comprising a planar patch antenna connected to the printed circuit card and having a cavity delimited by a ground plane and a conductive patch disposed on a dielectric support, the twin rear acoustical cavity is contained at least partially in the cavity of the antenna.
3. The structural arrangement claimed in claim 2 wherein the ground plane of the antenna has holes in it.
4. The structural arrangement claimed in claim 3 wherein the orifices formed in the printed circuit card constitute an opening in the card and at least one of the sound transducers is disposed in the opening.
5. The structural arrangement claimed in claim 3 wherein the orifices are holes formed in the printed circuit card.
6. The structural arrangement claimed in claim 2 wherein the orifices formed in the printed circuit card constitute an opening in the card and at least one of the sound transducers is disposed in the opening.
7. The structural arrangement claimed in claim 2 wherein the orifices are holes formed in the printed circuit card.
8. The structural arrangement claimed in claim 1 wherein the orifices formed in the printed circuit card constitute an opening in the card and at least one of the sound transducers is disposed in the opening.
9. The structural arrangement claimed in claim 1 wherein the orifices are holes formed in the printed circuit card.
10. The structural arrangement claimed in claim 1 wherein the orifices are notches formed between the printed circuit card and the casing of the terminal.