Playback devices having waveguides
US10397694B1 · kind B1 · utility
2Cited by
32References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2018 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Apr 2, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A playback device comprises an electroacoustic transducer; an acoustic waveguide in fluid communication with the transducer; and a housing delimiting an opening of the waveguide, the opening extending around an axis passing through the transducer. The opening may have a radial distance from the axis that varies with an azimuthal angle about the axis. An acoustic path length within the waveguide, between the transducer and the opening, is substantially constant and independent of azimuthal angle about the axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.