Virtual surround for loudspeakers with increased constant directivity
US8542854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2010 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Nov 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments use combinations of different methods for creating virtual surround. Some of the methods used in various embodiments include: dipole beamforming, multi-stage arrays, transducer directionality, and enclosure shading. In general, each of these methods may operate over a specific frequency band in various embodiments. The use of multiple methods to create virtual sound can increase the virtual sound effect and better maintain sound quality compared to the use of a single method for creating virtual surround. Each method used to create virtual surround can be optimized for a specific system configuration based on factors such as the physical set-up of the transducers, the size and shape of the enclosure, and the input signal configuration. Various embodiments allow for an intensity difference to be created for a listener across a wide range of frequencies in order to produce constant directionality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.