GB1356843A - Stereophonic sound systems - Google Patents
Stereophonic sound systemsInfo
- Publication number
- GB1356843A GB1356843A GB1765171A GB1765171A GB1356843A GB 1356843 A GB1356843 A GB 1356843A GB 1765171 A GB1765171 A GB 1765171A GB 1765171 A GB1765171 A GB 1765171A GB 1356843 A GB1356843 A GB 1356843A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fed
- signal
- loud
- signals
- amplifier
- 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
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)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Abstract
1356843 Quadraphonic system DYNACO Inc 27 May 1971 17651/71 Heading H4R Left "L" and right "R" channel signals of a stereophonic system have an "ambience" signal, "B", derived from microphones located near the back of a hall containing the programme source, added in opposite phase in the two channels. For reproduction the two channel signals are combined in opposite phase and fed to a loud-speaker situated at the back of the listening room while the individual channel signals are fed to respective loud-speakers located at the sides. In addition the two channels are combined in similar phase and fed to a loud-speaker mounted in the centre front of the listening room. As described with respect to Fig. 2a the L and R signals can be fed to respective amplifiers 15 and 18 and the "B" signal fed through a phase inverter circuit to derive two antiphase signals one of which is added, at 16, to the output from amplifier 15 and the other added, at 19, to the output from amplifier 18. In addition a signal "F" derived from a microphone mounted near the front of the hall containing the programme source is added, in the same phase, to both "L" and "R" signals. For reproduction the two channels can be fed to respective earpieces of a head set, Fig. 3b (not shown), or as in Fig. 3a, to respective amplifiers 35, 36 from which is fed a rear loudspeaker 40, connected from one amplifier to the other to reproduce the difference signal L - R + 2B, left and right loud-speakers each connected to the respective amplifier to reproduce the respective channel signal L + B + F and R - B + F and a front loud-speaker 44 connected to reproduce the sum signal L + R + 2F.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1765171A GB1356843A (en) | 1971-05-27 | 1971-05-27 | Stereophonic sound systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1765171A GB1356843A (en) | 1971-05-27 | 1971-05-27 | Stereophonic sound systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1356843A true GB1356843A (en) | 1974-06-19 |
Family
ID=10098893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1765171A Expired GB1356843A (en) | 1971-05-27 | 1971-05-27 | Stereophonic sound systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1356843A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2118808A (en) * | 1982-04-20 | 1983-11-02 | Neutrik Ag | Stereophonic sound reproduction in motor vehicles |
US4837825A (en) * | 1987-02-28 | 1989-06-06 | Shivers Clarence L | Passive ambience recovery system for the reproduction of sound |
US4882753A (en) * | 1988-01-19 | 1989-11-21 | Shivers Clarence L | Passive ambience recovery system for the reproduction of sound |
-
1971
- 1971-05-27 GB GB1765171A patent/GB1356843A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2118808A (en) * | 1982-04-20 | 1983-11-02 | Neutrik Ag | Stereophonic sound reproduction in motor vehicles |
US4837825A (en) * | 1987-02-28 | 1989-06-06 | Shivers Clarence L | Passive ambience recovery system for the reproduction of sound |
US4882753A (en) * | 1988-01-19 | 1989-11-21 | Shivers Clarence L | Passive ambience recovery system for the reproduction of sound |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1367705A (en) | Audio reproduction systems | |
Gerzon | Surround-sound psychoacoustics | |
GB1425519A (en) | Stereophonic signal reproducing apparatus | |
GB1367191A (en) | Multisound reproducing apparatus | |
GB1522135A (en) | Stereophonic sound system | |
GB1437129A (en) | Method and apparatus for imparting to headphones the sound- reproducing characteristics of loudspeakers | |
GB1347994A (en) | Sound recording and reproduction | |
GB1505329A (en) | Apparatus for wireless transmission of audio-frequency signals | |
GB1396352A (en) | Apparatus for reproducing quadraphonic sound | |
JPS5577295A (en) | Acoustic reproducing device | |
GB1369813A (en) | Reproduction of sound | |
GB1377080A (en) | Stereophonic reproducing system | |
GB1356843A (en) | Stereophonic sound systems | |
MY115284A (en) | Switched signal processing circuit | |
JPH0453400U (en) | ||
GB1456812A (en) | Sound pick-up device for multiphonic broadcasting and recording | |
JPS5546646A (en) | Speaker system | |
GB1387873A (en) | Decoder for quadraphonic sound | |
CN211831140U (en) | Single-track analog stereo circuit | |
JPS6022710Y2 (en) | amplifier output circuit | |
GB2003706A (en) | Audio signal translation for loudspeaker and headphone sound reproduction | |
JPS5311001A (en) | Headphone stereo reproducting system | |
KR19990026651A (en) | Sound recording apparatus having a stereo sound recording function and a stereo sound recording method according to the same | |
JPS6322800Y2 (en) | ||
GB1303021A (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |