Multiple-use acoustic port
US8290179B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Aug 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/035
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Two or more acoustic transducers share the same acoustic port in a device. The acoustic properties—such as acoustic impedance and frequency response—of the shared acoustic port are matched to each of the two or more acoustic transducers. To accomplish acoustic impedance matching, a separate back volume is provided for each of the acoustic transducers, matched to that transducer. Frequency response matching can be accomplished by the design of the transducer itself, but also by providing an adjacent element in the acoustic system of the transducer. One transducer may serve as an element in the acoustic system of another transducer. Frequency response adjustment of an individual element may also affect acoustic impedance of the entire port-transducer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.