Sound broadcasting system
US11006211B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2018 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Apr 16, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a sound broadcasting device comprising a high-frequency section including at least one high-frequency acoustic source (SHF), and a medium-frequency section including at least two medium-frequency sources (SMF), the acoustic sources (SHF, SMF) being vertically superposed, where the medium-frequency section comprises a lower sub-section, arranged below the high-frequency section and comprising at least one medium-frequency acoustic source (SMF), and an upper sub-section, arranged above the high-frequency section and comprising at least one medium-frequency acoustic source (SMF), where the vertical directivity of the high-frequency section has an incline, relative to the horizontal (H), that is substantially equal to the incline (θMF) of the vertical directivity of the medium-frequency section relative to the horizontal (H), so that the overall vertical directivity of the device has a non-zero incline (θDir) relative to the horizontal (H).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.