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FR2457703A1 - Automatic regulator for pass band linearity of electro acoustic appts. - operates without manual intervention by measuring level of generated sound - Google Patents

Automatic regulator for pass band linearity of electro acoustic appts. - operates without manual intervention by measuring level of generated sound

Info

Publication number
FR2457703A1
FR2457703A1 FR7915047A FR7915047A FR2457703A1 FR 2457703 A1 FR2457703 A1 FR 2457703A1 FR 7915047 A FR7915047 A FR 7915047A FR 7915047 A FR7915047 A FR 7915047A FR 2457703 A1 FR2457703 A1 FR 2457703A1
Authority
FR
France
Prior art keywords
microphone
appts
operates
equaliser
filters
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.)
Pending
Application number
FR7915047A
Other languages
French (fr)
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.)
ROSSET DIDIER
Original Assignee
ROSSET DIDIER
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 ROSSET DIDIER filed Critical ROSSET DIDIER
Priority to FR7915047A priority Critical patent/FR2457703A1/en
Publication of FR2457703A1 publication Critical patent/FR2457703A1/en
Pending 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
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/004—Monitoring arrangements; Testing arrangements for microphones
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/165—Equalizers; Volume or gain control in limited frequency bands

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

The device automatically regulates the passband linearity of an electroacoustic system, and comprises a microphone (3) at an optimum listening place supplying information to an equaliser (2) comprised of a number of filters. A noise generator (1) provides a reference signal transmitted through the equaliser to a chain of audio frequency appts. which transforms the signal into sound in turn detected by the microphone. The microphone is passed through a passband analyser (4), formed by filters, to comparators (5), which compare the filtered signals with a reference voltage (8) derived from a detector (6) monitoring all of the comparator outputs, the latter being applied to the equalisers. Depending on the analysis of the sound detected by the microphone, the equaliser filters are adjusted by the comparators to provide a desired optimum response curve.
FR7915047A 1979-05-31 1979-05-31 Automatic regulator for pass band linearity of electro acoustic appts. - operates without manual intervention by measuring level of generated sound Pending FR2457703A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7915047A FR2457703A1 (en) 1979-05-31 1979-05-31 Automatic regulator for pass band linearity of electro acoustic appts. - operates without manual intervention by measuring level of generated sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7915047A FR2457703A1 (en) 1979-05-31 1979-05-31 Automatic regulator for pass band linearity of electro acoustic appts. - operates without manual intervention by measuring level of generated sound

Publications (1)

Publication Number Publication Date
FR2457703A1 true FR2457703A1 (en) 1980-12-26

Family

ID=9226496

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7915047A Pending FR2457703A1 (en) 1979-05-31 1979-05-31 Automatic regulator for pass band linearity of electro acoustic appts. - operates without manual intervention by measuring level of generated sound

Country Status (1)

Country Link
FR (1) FR2457703A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981002658A1 (en) * 1980-03-13 1981-09-17 J Desclaux Automatic corrector for the frequency transmission characteristics of an electro acoustic channel
EP0075615A1 (en) * 1980-03-11 1983-04-06 Hok Lioe Han Sound field simulation system and method for calibrating same
EP0119791A1 (en) * 1983-03-08 1984-09-26 Victor Company Of Japan, Limited Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732370A (en) * 1971-02-24 1973-05-08 United Recording Electronic In Equalizer utilizing a comb of spectral frequencies as the test signal
FR2198344A1 (en) * 1972-09-05 1974-03-29 Radio Diffusion Tv Francaise
DE2732359A1 (en) * 1976-07-19 1978-01-26 Frye G J Automatic acoustical testing system - drives device to be tested with audio signal and processes output by circuit under computer control for digital read-outs
US4130726A (en) * 1977-06-29 1978-12-19 Teledyne, Inc. Loudspeaker system equalization
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732370A (en) * 1971-02-24 1973-05-08 United Recording Electronic In Equalizer utilizing a comb of spectral frequencies as the test signal
FR2198344A1 (en) * 1972-09-05 1974-03-29 Radio Diffusion Tv Francaise
DE2732359A1 (en) * 1976-07-19 1978-01-26 Frye G J Automatic acoustical testing system - drives device to be tested with audio signal and processes output by circuit under computer control for digital read-outs
US4130726A (en) * 1977-06-29 1978-12-19 Teledyne, Inc. Loudspeaker system equalization
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/77 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075615A1 (en) * 1980-03-11 1983-04-06 Hok Lioe Han Sound field simulation system and method for calibrating same
WO1981002658A1 (en) * 1980-03-13 1981-09-17 J Desclaux Automatic corrector for the frequency transmission characteristics of an electro acoustic channel
EP0119791A1 (en) * 1983-03-08 1984-09-26 Victor Company Of Japan, Limited Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field
US4559569A (en) * 1983-03-08 1985-12-17 Thomson-Brandt Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field

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