Acoustic waveguides for multi-channel playback devices
US11924605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2022 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Nov 16, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2227/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Acoustic waveguides can be used to improve audio performance of playback devices, such as a soundbar. Such a playback device can include an elongated body defining an outer perimeter with a forward surface, an upper surface, and a rounded edge between the forward surface and the upper surface. An up-firing transducer is configured to direct sound along an axis that has a vertical oblique angle with respect to a forward axis. A waveguide in fluid communication with the up-firing transducer includes a sidewall extending circumferentially around the transducer, the sidewall having a first end adjacent the up-firing transducer and a second end adjacent the outer perimeter, such that an opening defined by the sidewall has a larger area at the second end than at the first end. A rear portion of the sidewall is more steeply angled with respect to the axis than a forward portion of the sidewall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.