ES414567A1 - IMPROVEMENTS IN SOUND REPRODUCTION SYSTEMS. - Google Patents
IMPROVEMENTS IN SOUND REPRODUCTION SYSTEMS.Info
- Publication number
- ES414567A1 ES414567A1 ES414567A ES414567A ES414567A1 ES 414567 A1 ES414567 A1 ES 414567A1 ES 414567 A ES414567 A ES 414567A ES 414567 A ES414567 A ES 414567A ES 414567 A1 ES414567 A1 ES 414567A1
- Authority
- ES
- Spain
- Prior art keywords
- sound field
- signals
- systems
- sound
- microphones
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 230000002194 synthesizing effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
- Stereophonic Arrangements (AREA)
- Stereo-Broadcasting Methods (AREA)
- Circuit For Audible Band Transducer (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
Systems for producing a sound field in a region surrounding a listener wherein three information channels are utilized for conveying a first signal representative of total sound pressure (A) at a point in space, and two additional signals, A cos theta and A sin theta , for describing the directional characteristics of the sound field. An array of microphones having, for example, equal cardioidal response characteristics are arranged in the original sound field for detecting sound information. Linear, additive signal combining networks are coupled to the microphones for producing the three signals. A plurality of loudspeakers (e.g., four) are coupled to the three information channels by additional linear signal combining networks for reproduction of the sound field. Systems for synthesizing the three signals by electronic devices are also described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00251742A US3824342A (en) | 1972-05-09 | 1972-05-09 | Omnidirectional sound field reproducing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES414567A1 true ES414567A1 (en) | 1976-02-01 |
Family
ID=22953214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES414567A Expired ES414567A1 (en) | 1972-05-09 | 1973-05-09 | IMPROVEMENTS IN SOUND REPRODUCTION SYSTEMS. |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US3824342A (en) |
| JP (1) | JPS5215201B2 (en) |
| AT (1) | AT350294B (en) |
| BR (1) | BR7303322D0 (en) |
| CA (1) | CA976090A (en) |
| CH (1) | CH565494A5 (en) |
| DD (1) | DD104673A5 (en) |
| DE (1) | DE2317124A1 (en) |
| DK (1) | DK137110B (en) |
| ES (1) | ES414567A1 (en) |
| FR (1) | FR2183974B1 (en) |
| GB (1) | GB1432153A (en) |
| IT (1) | IT984179B (en) |
| NL (1) | NL7306404A (en) |
| SE (1) | SE378969B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970788A (en) * | 1971-10-06 | 1976-07-20 | Cooper Duane H | Monaural and stereo compatible multidirectional sound matrixing |
| GB1494751A (en) * | 1974-03-26 | 1977-12-14 | Nat Res Dev | Sound reproduction systems |
| US3940559A (en) * | 1974-04-18 | 1976-02-24 | Cbs Inc. | Compatible four channel recording and reproducing system |
| GB1512514A (en) * | 1974-07-12 | 1978-06-01 | Nat Res Dev | Microphone assemblies |
| JPS5187002A (en) * | 1975-01-29 | 1976-07-30 | Nippon Telegraph & Telephone | 4 chanerusutereohoshiki |
| JPS5230402A (en) * | 1975-09-04 | 1977-03-08 | Victor Co Of Japan Ltd | Multichannel stereo system |
| US4074084A (en) * | 1975-11-05 | 1978-02-14 | Berg Johannes C M Van Den | Method and apparatus for receiving sound intended for stereophonic reproduction |
| US4095049A (en) * | 1976-03-15 | 1978-06-13 | National Research Development Corporation | Non-rotationally-symmetric surround-sound encoding system |
| GB1548674A (en) * | 1976-07-01 | 1979-07-18 | Nat Res Dev | Sound reproduction systems |
| US4236039A (en) * | 1976-07-19 | 1980-11-25 | National Research Development Corporation | Signal matrixing for directional reproduction of sound |
| US4392019A (en) * | 1980-12-19 | 1983-07-05 | Independent Broadcasting Authority | Surround sound system |
| HU190912B (en) * | 1983-09-07 | 1986-12-28 | Polyak,Gabor,Hu | Method and apparatus for making stereoscopic sound effects |
| US6041127A (en) * | 1997-04-03 | 2000-03-21 | Lucent Technologies Inc. | Steerable and variable first-order differential microphone array |
| ITMI20020566A1 (en) * | 2002-03-18 | 2003-09-18 | Daniele Ramenzoni | DEVICE TO CAPTURE EVEN SMALL MOVEMENTS IN THE AIR AND IN FLUIDS SUITABLE FOR CYBERNETIC AND LABORATORY APPLICATIONS AS TRANSDUCER |
| US8130977B2 (en) * | 2005-12-27 | 2012-03-06 | Polycom, Inc. | Cluster of first-order microphones and method of operation for stereo input of videoconferencing system |
| TWI498014B (en) * | 2012-07-11 | 2015-08-21 | Univ Nat Cheng Kung | Method for generating optimal sound field using speakers |
| US10631085B2 (en) | 2018-05-07 | 2020-04-21 | Crestron Electronics, Inc. | Microphone array system with Ethernet connection |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3746792A (en) * | 1968-01-11 | 1973-07-17 | P Scheiber | Multidirectional sound system |
| GB1359509A (en) * | 1970-06-15 | 1974-07-10 | Scheiber P | Decoder apparatus for use in a multidirectional sound system |
-
1972
- 1972-05-09 US US00251742A patent/US3824342A/en not_active Expired - Lifetime
-
1973
- 1973-04-05 DE DE2317124A patent/DE2317124A1/en not_active Withdrawn
- 1973-04-24 CA CA169,399A patent/CA976090A/en not_active Expired
- 1973-04-30 IT IT23574/73A patent/IT984179B/en active
- 1973-05-07 CH CH646473A patent/CH565494A5/xx not_active IP Right Cessation
- 1973-05-07 DD DD170651A patent/DD104673A5/xx unknown
- 1973-05-08 BR BR3322/73A patent/BR7303322D0/en unknown
- 1973-05-08 NL NL7306404A patent/NL7306404A/xx not_active Application Discontinuation
- 1973-05-08 GB GB2174673A patent/GB1432153A/en not_active Expired
- 1973-05-08 JP JP48051041A patent/JPS5215201B2/ja not_active Expired
- 1973-05-08 SE SE7306449A patent/SE378969B/xx unknown
- 1973-05-08 DK DK253273AA patent/DK137110B/en unknown
- 1973-05-09 ES ES414567A patent/ES414567A1/en not_active Expired
- 1973-05-09 FR FR7316629A patent/FR2183974B1/fr not_active Expired
- 1973-05-09 AT AT410273A patent/AT350294B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US3824342A (en) | 1974-07-16 |
| JPS4955301A (en) | 1974-05-29 |
| FR2183974A1 (en) | 1973-12-21 |
| CA976090A (en) | 1975-10-14 |
| ATA410273A (en) | 1978-10-15 |
| GB1432153A (en) | 1976-04-14 |
| CH565494A5 (en) | 1975-08-15 |
| FR2183974B1 (en) | 1978-02-10 |
| AU5511673A (en) | 1974-11-07 |
| SE378969B (en) | 1975-09-15 |
| BR7303322D0 (en) | 1974-07-11 |
| DE2317124A1 (en) | 1973-11-22 |
| IT984179B (en) | 1974-11-20 |
| AT350294B (en) | 1979-05-25 |
| DD104673A5 (en) | 1974-03-12 |
| JPS5215201B2 (en) | 1977-04-27 |
| DK137110B (en) | 1978-01-16 |
| DK137110C (en) | 1978-06-19 |
| NL7306404A (en) | 1973-11-13 |
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