FR2269267A1 - Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal - Google Patents

Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal

Info

Publication number
FR2269267A1
FR2269267A1 FR7414802A FR7414802A FR2269267A1 FR 2269267 A1 FR2269267 A1 FR 2269267A1 FR 7414802 A FR7414802 A FR 7414802A FR 7414802 A FR7414802 A FR 7414802A FR 2269267 A1 FR2269267 A1 FR 2269267A1
Authority
FR
France
Prior art keywords
loudspeaker
variation
acceleration
coil
impedance
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
FR7414802A
Other languages
French (fr)
Other versions
FR2269267B1 (en
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.)
FORET JACQUES
Original Assignee
FORET JACQUES
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 FORET JACQUES filed Critical FORET JACQUES
Priority to FR7414802A priority Critical patent/FR2269267A1/en
Publication of FR2269267A1 publication Critical patent/FR2269267A1/en
Application granted granted Critical
Publication of FR2269267B1 publication Critical patent/FR2269267B1/fr
Granted 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

Landscapes

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

Abstract

This corrector for distortion in loudspeaker output power bases its design upon the fact that the power is constant if the membrane acceleration is constant over the range of audible frequencies. A comparator (c) is connected via filters (F) to the loudspeaker amplifier (A) and a loudspeaker coil-impedance simulator (v) that has an impedance equal to the static coil. In operation, variation of acceleration will be sensed as variation of coil-impedance and suitable error signals generated into an amplifier feedback loop. Filters (F, G) are included to overcome loop phase problems. This design solves the problems previously experienced such as the cost of high quality accelerometers and the bandwith limitations of bridge circuits.
FR7414802A 1974-04-29 1974-04-29 Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal Granted FR2269267A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7414802A FR2269267A1 (en) 1974-04-29 1974-04-29 Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7414802A FR2269267A1 (en) 1974-04-29 1974-04-29 Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal

Publications (2)

Publication Number Publication Date
FR2269267A1 true FR2269267A1 (en) 1975-11-21
FR2269267B1 FR2269267B1 (en) 1978-12-15

Family

ID=9138260

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7414802A Granted FR2269267A1 (en) 1974-04-29 1974-04-29 Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal

Country Status (1)

Country Link
FR (1) FR2269267A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118600A (en) * 1976-03-24 1978-10-03 Karl Erik Stahl Loudspeaker lower bass response using negative resistance and impedance loading
FR2422309A1 (en) * 1978-04-04 1979-11-02 Daniere Joannes Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier
US5060274A (en) * 1988-06-10 1991-10-22 Ishikawajima-Harima Heavy Industries Co., Ltd. Hydrostatic speaker and speaker driver
US5226089A (en) * 1990-04-16 1993-07-06 Samsung Electronics Co., Ltd. Circuit and method for compensating low frequency band for use in a speaker
US5962540A (en) * 1994-08-03 1999-10-05 Henkel Kommanditgesellschaft Auf Aktien One-component or two-component reactive adhesive

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118600A (en) * 1976-03-24 1978-10-03 Karl Erik Stahl Loudspeaker lower bass response using negative resistance and impedance loading
FR2422309A1 (en) * 1978-04-04 1979-11-02 Daniere Joannes Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier
US5060274A (en) * 1988-06-10 1991-10-22 Ishikawajima-Harima Heavy Industries Co., Ltd. Hydrostatic speaker and speaker driver
US5226089A (en) * 1990-04-16 1993-07-06 Samsung Electronics Co., Ltd. Circuit and method for compensating low frequency band for use in a speaker
US5962540A (en) * 1994-08-03 1999-10-05 Henkel Kommanditgesellschaft Auf Aktien One-component or two-component reactive adhesive

Also Published As

Publication number Publication date
FR2269267B1 (en) 1978-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse