Auditorium simulator economizes on delay line bandwidth
US4039755A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1976 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Jul 26, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S5/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A filter network for use with an acoustic signal reproduction system having at least two, spatially separable, speaker means each capable of reproducing acoustic waves from corresponding electrical signal. The network includes a frequency divider for separating an electrical signal representative of acoustic waves into first and second components, the first component including primarily those audio frequencies, which when acoustically reproduced tend to provide unambiguous binaural phase localization. The second component includes primarily those audio frequencies which when acoustically reproduced tend not to provide unambiguous binaural phase localization. The network also includes structure for delaying the first component for a predetermined period of time to produce a delayed signal so that when the combined first and second components are applied to one of the speaker means and the combined second component and the delayed signal are applied to the other of the speaker means the acoustic field produced tends to simulate spaciousness or ambience of a larger room than the actual listening area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.