Structural arrangement for a radio communication terminal incorporating a loudspeaker and an earpiece
US7142827B2 · kind B2 · utility
7Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2003 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Jan 9, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/035
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.