Nothing Special   »   [go: up one dir, main page]

FR2422309A1 - Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier - Google Patents

Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier

Info

Publication number
FR2422309A1
FR2422309A1 FR7810700A FR7810700A FR2422309A1 FR 2422309 A1 FR2422309 A1 FR 2422309A1 FR 7810700 A FR7810700 A FR 7810700A FR 7810700 A FR7810700 A FR 7810700A FR 2422309 A1 FR2422309 A1 FR 2422309A1
Authority
FR
France
Prior art keywords
loudspeaker
power amplifier
membrane
membranes
provide feedback
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
FR7810700A
Other languages
French (fr)
Other versions
FR2422309B1 (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.)
DANIERE JOANNES
Original Assignee
DANIERE JOANNES
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 DANIERE JOANNES filed Critical DANIERE JOANNES
Priority to FR7810700A priority Critical patent/FR2422309A1/en
Priority to FR7900483A priority patent/FR2446044A2/en
Publication of FR2422309A1 publication Critical patent/FR2422309A1/en
Application granted granted Critical
Publication of FR2422309B1 publication Critical patent/FR2422309B1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The loudspeaker system has a broadband membrane loudspeaker or electroacoustic transducer. The membrane is accelerated by a range of low frequencies covering the membrane's entire range of mechanical resonant frequencies. The loudspeaker is connected to a power amplifier. The loudspeaker's feedback path contains a device for measuring average acceleration over the entire surface of the membrane. The measuring device and a control-current measuring device are connected to a low pass filter and to a high pass filter. The amplifier's feedback signal is formed by adding the acceleration and current information.
FR7810700A 1978-04-04 1978-04-04 Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier Granted FR2422309A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7810700A FR2422309A1 (en) 1978-04-04 1978-04-04 Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier
FR7900483A FR2446044A2 (en) 1978-04-04 1979-01-04 Wide range acoustic transducer - uses reinforced plastics ribbons coated with metal film and secured between spaced strip magnets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7810700A FR2422309A1 (en) 1978-04-04 1978-04-04 Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier

Publications (2)

Publication Number Publication Date
FR2422309A1 true FR2422309A1 (en) 1979-11-02
FR2422309B1 FR2422309B1 (en) 1983-03-11

Family

ID=9206983

Family Applications (2)

Application Number Title Priority Date Filing Date
FR7810700A Granted FR2422309A1 (en) 1978-04-04 1978-04-04 Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier
FR7900483A Pending FR2446044A2 (en) 1978-04-04 1979-01-04 Wide range acoustic transducer - uses reinforced plastics ribbons coated with metal film and secured between spaced strip magnets

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR7900483A Pending FR2446044A2 (en) 1978-04-04 1979-01-04 Wide range acoustic transducer - uses reinforced plastics ribbons coated with metal film and secured between spaced strip magnets

Country Status (1)

Country Link
FR (2) FR2422309A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335274A (en) * 1980-01-11 1982-06-15 Ayers Richard A Sound reproduction system
WO1999059377A1 (en) * 1998-05-12 1999-11-18 Centre Scientifique Et Technique Du Batiment (Cstb) Active acoustic impedance control device
WO2015132486A1 (en) 2014-03-04 2015-09-11 Whylot Sas Device and method for filtering the resonance peak in a circuit supplying at least one loudspeaker
WO2015140421A1 (en) 2014-03-05 2015-09-24 Whylot Sas Device and method for filtering the resonance peak in a circuit for supplying at least one loud speaker upstream of the latter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2854758B1 (en) * 2003-05-06 2005-12-02 Guy Marie Alain Delhommeau ACOUSTIC SYSTEM WITH MULTIPLE RIBBED TRANSDUCERS REPRODUCING THE SPECTRUM OF AUDIBLE FREQUENCIES

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199241A1 (en) * 1972-09-11 1974-04-05 Matsushita Electric Ind Co Ltd
FR2269267A1 (en) * 1974-04-29 1975-11-21 Foret Jacques Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal
FR2306589A1 (en) * 1975-03-21 1976-10-29 Lassale Jean Claude Loudspeaker feedback circuit for eliminating resonances - produces constant acoustic press. and constant power at high frequencies
FR2321811A1 (en) * 1975-08-19 1977-03-18 Vissiere Charles Correction circuit for electroacoustic transducer - has two differential amplifiers across transducer feeding error signal back to signal amplifier

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027541A (en) * 1951-08-11 1962-03-27 Harris Transducer Corp Structure for use in an electrodynamic transducer
FR1315545A (en) * 1961-02-20 1963-01-18 Yeda Res & Dev Electroacoustic transducer
AT239344B (en) * 1963-03-13 1965-03-25 Akg Akustische Kino Geraete Electrodynamic headphones
US3674946A (en) * 1970-12-23 1972-07-04 Magnepan Inc Electromagnetic transducer
US3919499A (en) * 1974-01-11 1975-11-11 Magnepan Inc Planar speaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199241A1 (en) * 1972-09-11 1974-04-05 Matsushita Electric Ind Co Ltd
FR2269267A1 (en) * 1974-04-29 1975-11-21 Foret Jacques Distortion corrector for loudspeaker - senses variation in membrane acceleration to produce correction signal
FR2306589A1 (en) * 1975-03-21 1976-10-29 Lassale Jean Claude Loudspeaker feedback circuit for eliminating resonances - produces constant acoustic press. and constant power at high frequencies
FR2321811A1 (en) * 1975-08-19 1977-03-18 Vissiere Charles Correction circuit for electroacoustic transducer - has two differential amplifiers across transducer feeding error signal back to signal amplifier

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335274A (en) * 1980-01-11 1982-06-15 Ayers Richard A Sound reproduction system
WO1999059377A1 (en) * 1998-05-12 1999-11-18 Centre Scientifique Et Technique Du Batiment (Cstb) Active acoustic impedance control device
FR2778741A1 (en) * 1998-05-12 1999-11-19 Scient Et Tech Du Batiment Cst Active acoustic impedance control system for noise reduction
WO2015132486A1 (en) 2014-03-04 2015-09-11 Whylot Sas Device and method for filtering the resonance peak in a circuit supplying at least one loudspeaker
EP3249949A1 (en) 2014-03-04 2017-11-29 Université du Maine Device and method for filtering the resonance peak in the power supply circuit of at least one speaker
WO2015140421A1 (en) 2014-03-05 2015-09-24 Whylot Sas Device and method for filtering the resonance peak in a circuit for supplying at least one loud speaker upstream of the latter

Also Published As

Publication number Publication date
FR2446044A2 (en) 1980-08-01
FR2422309B1 (en) 1983-03-11

Similar Documents

Publication Publication Date Title
GB1522031A (en) Electroacoustic impedance bridges
CA2240026A1 (en) Speaker and amplifier system
DK161288C (en) Telephone instrument handset
US3730046A (en) Orally operated electronic musical instrument
US4230013A (en) Electro-acoustic transducer
US3322875A (en) Harmonica electronic amplification
FR2422309A1 (en) Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier
USH1503H (en) Cordless electric guitar
EP0353092A3 (en) Apparatus and method for reproducing high fidelity sound
GB911866A (en) Condenser microphones
ATE146327T1 (en) AUDIO FREQUENCY FILTER AND METHOD FOR DETERMINING THE FILTER FUNCTION OF AN AUDIO FREQUENCY FILTER
JPS644199A (en) Electrostatic speaker
GB1518299A (en) Audio monitor
FR2413841A1 (en) HI=FI sound reproduction control system - has amplifier in one speaker receiving signals from other speakers, and indicating acoustic quality of room
FR2362547A1 (en) Servo controlled bass loudspeaker enclosure - has feedback system to obtain low bass frequency and independence of air loading
GB762928A (en) Magnetic sound transduction
JPS5572879A (en) Electro-acoustic converter for azimuth measurement
JPS5364501A (en) Acoustic device
JPS5725795A (en) Sound generator and sound receiver
JPS6230080Y2 (en)
Koidan Sound‐Pressure Measurement without Energy Absorption
Rosenzweig et al. Refractory Phases in the Electrical Activity of the Auditory Nervous System
IT1024704B (en) Microphone with sound sensitive element - mounted symmetrically in housing, for disturbing noises to equally effect both sides reduces interference to minimum
JPS54127302A (en) Frequency conversion system
FR2306589A1 (en) Loudspeaker feedback circuit for eliminating resonances - produces constant acoustic press. and constant power at high frequencies

Legal Events

Date Code Title Description
ST Notification of lapse