GB2131651A - Environment-adaptive loudspeaker systems - Google Patents

Environment-adaptive loudspeaker systems

Info

Publication number
GB2131651A
GB2131651A GB08402824A GB8402824A GB2131651A GB 2131651 A GB2131651 A GB 2131651A GB 08402824 A GB08402824 A GB 08402824A GB 8402824 A GB8402824 A GB 8402824A GB 2131651 A GB2131651 A GB 2131651A
Authority
GB
United Kingdom
Prior art keywords
loudspeaker
environment
velocity
sensing means
loudspeaker systems
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.)
Granted
Application number
GB08402824A
Other versions
GB8402824D0 (en
GB2131651B (en
Inventor
Glyn John Adams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
B&W Loudspeakers Ltd
Original Assignee
B&W Loudspeakers Ltd
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 B&W Loudspeakers Ltd filed Critical B&W Loudspeakers Ltd
Publication of GB8402824D0 publication Critical patent/GB8402824D0/en
Publication of GB2131651A publication Critical patent/GB2131651A/en
Application granted granted Critical
Publication of GB2131651B publication Critical patent/GB2131651B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/14—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for gain control and tone control
    • H03G9/16—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for gain control and tone control incorporating negative feedback

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

High fidelity reproduction is adversely affected by normal room acoustics and the relative position of a loudspeaker system with respect to the room boundaries. To provide optimum results the invention proposes the use of pressure-sensing means (38) and velocity-sensing means (39) mounted to determine the instantaneous pressure and velocity at the surface of a loudspeaker diaphragm (33) and supply signals to a processor (40) which controls the transfer characteristic of a correction filter (37) via which input signals are fed to the loudspeaker.
GB08402824A 1982-06-30 1983-06-29 Environment-adaptive loudspeaker systems Expired GB2131651B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8218866 1982-06-30
PCT/GB1983/000163 WO1984000274A1 (en) 1982-06-30 1983-06-29 Environment-adaptive loudspeaker systems

Publications (3)

Publication Number Publication Date
GB8402824D0 GB8402824D0 (en) 1984-03-07
GB2131651A true GB2131651A (en) 1984-06-20
GB2131651B GB2131651B (en) 1986-10-22

Family

ID=10531377

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08402824A Expired GB2131651B (en) 1982-06-30 1983-06-29 Environment-adaptive loudspeaker systems

Country Status (4)

Country Link
EP (1) EP0113370A1 (en)
AU (1) AU1772783A (en)
GB (1) GB2131651B (en)
WO (1) WO1984000274A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196815A (en) * 1986-09-25 1988-05-05 David Robin Birt Motional feedback system for loudspeakers
GB2292854A (en) * 1994-08-12 1996-03-06 Motorola Ltd Control of audio output using motional feedback and ambient noise detection

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3429147A1 (en) * 1984-08-08 1986-02-20 Friedrich 6650 Homburg Müller ARRANGEMENT FOR ACOUSTIC COUPLING OF SPEAKERS
JP2682014B2 (en) * 1988-06-10 1997-11-26 石川島播磨重工業株式会社 Hydraulic drive speaker
FR2635428B1 (en) * 1988-08-11 1994-03-11 Vient Jean Louis SELF-DRIVING LONG-RANGE SOUND RESTITUTION PROCESS
GB2260875B (en) * 1991-10-23 1995-06-28 Anthony Best Dynamics Ltd Noise source
GB2264208B (en) * 1992-02-15 1996-05-22 Maximilian Hans Hobelsberger A loudspeaker system
CH685657A5 (en) * 1992-03-24 1995-08-31 Maximilian Hobelsberger An active simulation of an acoustic impedance.
US5812686A (en) * 1992-03-24 1998-09-22 Hobelsberger; Maximilian Hans Device for active simultation of an acoustical impedance
JP3097340B2 (en) * 1992-08-19 2000-10-10 ソニー株式会社 Headphone equipment
GB9513894D0 (en) * 1995-07-07 1995-09-06 Univ Salford The Loudspeaker circuit
US5666427A (en) * 1995-09-30 1997-09-09 Samsung Heavy Industries Co. Ltd. Method of and apparatus for controlling noise generated in confined spaces
EP0772374B1 (en) 1995-11-02 2008-10-08 Bang & Olufsen A/S Method and apparatus for controlling the performance of a loudspeaker in a room
US6353670B1 (en) 1996-07-02 2002-03-05 Donald R. Gasner Actively control sound transducer
DE19746645C1 (en) * 1997-10-22 1999-05-20 Fraunhofer Ges Forschung Adaptive acoustic monitor
DK199901256A (en) * 1998-10-06 1999-10-05 Bang & Olufsen As Multimedia System
US20010012792A1 (en) * 1999-05-27 2001-08-09 Matthew J. Murray Automatically adjusting acoustic output of the speaker of a telephone handset
EP1126684A1 (en) * 2000-02-14 2001-08-22 Ascom AG Method for controlling the sound volume of an electro-acoustic transducer
DE102005048905B3 (en) * 2005-10-10 2006-08-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Active channel noise attenuator having several acoustic sensors to detect the noise field parameters at the loud speaker
GB2499026B (en) 2012-02-03 2014-05-28 Canon Kk A loudspeaker driver with sensing coils for sensing the position and velocity of a voice-coil
GB2532794A (en) * 2014-11-28 2016-06-01 Digital Audio S A Versatile electroacoustic diffuser-absorber
US10469046B2 (en) * 2017-03-10 2019-11-05 Samsung Electronics Co., Ltd. Auto-equalization, in-room low-frequency sound power optimization
WO2018164438A1 (en) * 2017-03-10 2018-09-13 Samsung Electronics Co., Ltd. Method and apparatus for in-room low-frequency sound power optimization
WO2021204400A1 (en) * 2020-04-09 2021-10-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for automatic adaption of a loudspeaer to a listening environment

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141141A1 (en) * 1971-08-12 1973-02-22 Neumann Gmbh Georg CIRCUIT ARRANGEMENT FOR COUPLING OF A SPEAKER
US3889060A (en) * 1972-09-11 1975-06-10 Matsushita Electric Ind Co Ltd Feedback amplifier distortion-cancelling circuit
GB1542264A (en) * 1975-04-24 1979-03-14 Acoustic Res Int Loudspeaker systems
DE2538073A1 (en) * 1975-08-27 1977-03-10 Elektroakustische Geraete H Hi Drive circuit for loudspeaker - has feedback dependent on difference between membrane movement and input signal
DE2626652C3 (en) * 1976-06-15 1979-11-22 Friedemann Dipl.-Ing. 8000 Muenchen Meggl Control arrangement for sound transmitters
DE2637414C3 (en) * 1976-08-19 1979-06-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Amplitude measuring device for servo control of a loudspeaker
FR2413009A1 (en) * 1977-12-20 1979-07-20 Oceanic Automatic acoustic frequency response corrector for speakers - stores output of one filter to compare with signal passed through remaining filters to control attenuator
US4306113A (en) * 1979-11-23 1981-12-15 Morton Roger R A Method and equalization of home audio systems
US4316060A (en) * 1980-01-04 1982-02-16 Dbx, Inc. Equalizing system
FR2478409A1 (en) * 1980-03-13 1981-09-18 Desclaux Jean Francois AUTOMATIC CORRECTOR FOR FREQUENCY TRANSMISSION CHARACTERISTICS OF AN ELECTROACOUSTIC CHANNEL

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196815A (en) * 1986-09-25 1988-05-05 David Robin Birt Motional feedback system for loudspeakers
GB2292854A (en) * 1994-08-12 1996-03-06 Motorola Ltd Control of audio output using motional feedback and ambient noise detection
GB2292854B (en) * 1994-08-12 1999-08-25 Motorola Ltd Electronic audio device and method of operation

Also Published As

Publication number Publication date
GB8402824D0 (en) 1984-03-07
AU1772783A (en) 1984-01-26
GB2131651B (en) 1986-10-22
EP0113370A1 (en) 1984-07-18
WO1984000274A1 (en) 1984-01-19

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years