IT953204B - Perfezionamento nei circuiti di controllo e regolazione di sistemi di riproduzione quadrifonica del suono - Google Patents

Perfezionamento nei circuiti di controllo e regolazione di sistemi di riproduzione quadrifonica del suono

Info

Publication number
IT953204B
IT953204B IT54648/71A IT5464871A IT953204B IT 953204 B IT953204 B IT 953204B IT 54648/71 A IT54648/71 A IT 54648/71A IT 5464871 A IT5464871 A IT 5464871A IT 953204 B IT953204 B IT 953204B
Authority
IT
Italy
Prior art keywords
improvement
control
sound reproduction
reproduction systems
regulation circuits
Prior art date
Application number
IT54648/71A
Other languages
English (en)
Original Assignee
Motorola Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of IT953204B publication Critical patent/IT953204B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/13—Aspects of volume control, not necessarily automatic, in stereophonic sound systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
IT54648/71A 1970-12-22 1971-12-09 Perfezionamento nei circuiti di controllo e regolazione di sistemi di riproduzione quadrifonica del suono IT953204B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10057970A 1970-12-22 1970-12-22

Publications (1)

Publication Number Publication Date
IT953204B true IT953204B (it) 1973-08-10

Family

ID=22280472

Family Applications (1)

Application Number Title Priority Date Filing Date
IT54648/71A IT953204B (it) 1970-12-22 1971-12-09 Perfezionamento nei circuiti di controllo e regolazione di sistemi di riproduzione quadrifonica del suono

Country Status (6)

Country Link
US (1) US3702901A (it)
JP (1) JPS512585Y2 (it)
CA (1) CA941310A (it)
DE (1) DE2161474A1 (it)
GB (1) GB1317530A (it)
IT (1) IT953204B (it)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879747A (en) * 1968-12-04 1975-04-22 Matsushita Electric Industrial Co Ltd Remote control device
US3937885A (en) * 1974-09-06 1976-02-10 Motorola, Inc. Control circuit for a matrixed four channel audio reproducing system
JPS5226144A (en) * 1975-08-22 1977-02-26 Shinshirasuna Denki Kk Automatic gain control circuit
US4113984A (en) * 1976-09-17 1978-09-12 General Motors Corporation Voltage translating circuit for volume and balance control of a four-channel audio system
US4245136A (en) * 1980-08-08 1981-01-13 Krauel Jr Robert W Monitor ampliphones
US4404527A (en) * 1980-11-03 1983-09-13 General Motors Corporation Bridge audio amplifier including low level fade control
US4404429A (en) * 1981-05-07 1983-09-13 Rca Corporation Matching volume control characteristics for two channels
US4521906A (en) * 1983-03-28 1985-06-04 Kahn Leonard R Speaker systems for producing balanced stereo images at multiple locations
JP2514141Y2 (ja) * 1984-05-31 1996-10-16 パイオニア株式会社 車載用音場補正装置
DE3427000A1 (de) * 1984-07-21 1986-01-30 Philips Patentverwaltung Ueberblend-schaltungseinrichtung an elektrischen wiedergabegeraeten und ueberblendregler fuer eine derartige schaltungseinrichtung
JPH0236698A (ja) * 1988-07-26 1990-02-06 Mazda Motor Corp 車両用オーディオ装置
US5122720A (en) * 1989-12-01 1992-06-16 Martinsound Technologies, Inc. Automated fader system
JP2002152900A (ja) * 2000-11-09 2002-05-24 Pioneer Electronic Corp 音量制御装置
US7305097B2 (en) * 2003-02-14 2007-12-04 Bose Corporation Controlling fading and surround signal level
US20050185806A1 (en) * 2003-02-14 2005-08-25 Salvador Eduardo T. Controlling fading and surround signal level
US20060280316A1 (en) * 2005-06-09 2006-12-14 Lear Corporation Audio system and method for controlling an audio system
WO2008006376A1 (en) * 2006-07-13 2008-01-17 Bang & Olufsen A/S A method, apparatus, and system for spatial redistribution of direct and ambient sound.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899505A (en) * 1959-08-11 Re-recording mixer for multi-sound track records
US2148030A (en) * 1936-07-25 1939-02-21 Rca Corp Automatic tone control system
US2488410A (en) * 1945-01-26 1949-11-15 Rca Corp Control circuits for alternating current transmission networks
US2474191A (en) * 1947-06-06 1949-06-21 Avco Mfg Corp Tone control
US3397286A (en) * 1964-09-17 1968-08-13 Gen Motors Corp Four-speaker adjustable stereo sound system

Also Published As

Publication number Publication date
GB1317530A (en) 1973-05-23
CA941310A (en) 1974-02-05
DE2161474A1 (de) 1972-07-13
US3702901A (en) 1972-11-14
JPS512585Y2 (it) 1976-01-26
JPS471120U (it) 1972-08-11

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