Methods and apparatus for porting loudspeakers to an earpiece
US9432772B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 2012 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Oct 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hand-held electronic device includes an earpiece, a first speaker having a first primary audio output ported to the earpiece, a second speaker having a second primary audio output and a second bass reflex output, with the second bass reflex audio output also being ported to the earpiece. The device includes a use case manager configured to determine a mode of operation of the device, and a controller configured to drive the first and second speakers in either a broadcast mode or a private mode in response to a signal from the use case manager. The polarity of the signal driving the second speaker is inverted for frequencies below the bass reflex port resonance frequency, to thereby provide a higher total combined energy in the vicinity of port resonance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.