FR2477824A1 - Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse - Google Patents

Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse Download PDF

Info

Publication number
FR2477824A1
FR2477824A1 FR8005143A FR8005143A FR2477824A1 FR 2477824 A1 FR2477824 A1 FR 2477824A1 FR 8005143 A FR8005143 A FR 8005143A FR 8005143 A FR8005143 A FR 8005143A FR 2477824 A1 FR2477824 A1 FR 2477824A1
Authority
FR
France
Prior art keywords
membrane
blank
membranes
cutting
process according
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
FR8005143A
Other languages
English (en)
French (fr)
Other versions
FR2477824B1 (https=
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8005143A priority Critical patent/FR2477824A1/fr
Priority to US06/234,020 priority patent/US4348342A/en
Priority to JP3143481A priority patent/JPS56143796A/ja
Publication of FR2477824A1 publication Critical patent/FR2477824A1/fr
Application granted granted Critical
Publication of FR2477824B1 publication Critical patent/FR2477824B1/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Molding Of Porous Articles (AREA)
FR8005143A 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse Granted FR2477824A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8005143A FR2477824A1 (fr) 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse
US06/234,020 US4348342A (en) 1980-03-07 1981-02-12 Method for making electrodynamic loudspeakers having a planar diaphragm of expanded polystyrene
JP3143481A JPS56143796A (en) 1980-03-07 1981-03-06 Method of manufacturing diaphragm for dynamic speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8005143A FR2477824A1 (fr) 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse

Publications (2)

Publication Number Publication Date
FR2477824A1 true FR2477824A1 (fr) 1981-09-11
FR2477824B1 FR2477824B1 (https=) 1984-02-17

Family

ID=9239425

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8005143A Granted FR2477824A1 (fr) 1980-03-07 1980-03-07 Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse

Country Status (3)

Country Link
US (1) US4348342A (https=)
JP (1) JPS56143796A (https=)
FR (1) FR2477824A1 (https=)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1497849A (fr) * 1964-02-05 1967-10-13 Electronic Res Associates Haut-parleur
FR2036087A5 (https=) * 1969-03-04 1970-12-24 Gogny Georges

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604663A (en) * 1950-01-06 1952-07-29 Talalay Joseph Anton Method of making a cellular rubber article
GB884322A (en) 1959-06-15 1961-12-13 Scholl Mfg Co Ltd Improvements in and relating to fashioning plastic foam
FR1269138A (fr) 1960-06-23 1961-08-11 Perfectionnements apportés aux haut-parleurs, aux microphones, et aux dispositifs analogues, de type électrodynamique
US3863908A (en) * 1965-04-15 1975-02-04 Saint Gobain Cellular, resinous products and methods and apparatus for making them
FR1555781A (https=) * 1967-12-06 1969-01-31
US3889032A (en) * 1972-05-10 1975-06-10 Lester Max Koelsch Foamed plastic sheet material and system for its manufacture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1497849A (fr) * 1964-02-05 1967-10-13 Electronic Res Associates Haut-parleur
FR2036087A5 (https=) * 1969-03-04 1970-12-24 Gogny Georges

Also Published As

Publication number Publication date
JPS56143796A (en) 1981-11-09
US4348342A (en) 1982-09-07
FR2477824B1 (https=) 1984-02-17

Similar Documents

Publication Publication Date Title
EP1157372B1 (fr) Procede de fabrication d'un panneau d'attenuation acoustique a couche resistive a propriete structurale et panneau ainsi obtenu
EP0770472B1 (fr) Procédé de fabrication d'un panneau en matériau composite avec moulage par transfert de résine
KR102681655B1 (ko) 단결정층, 특히 압전층의 제조방법
EP1239454A1 (fr) Procédé de fabrication d'un panneau à couche résistive acoustique adaptée et panneau acoustique ainsi obtenu
FR2552012A1 (fr) Procede de fabrication d'un moule pour realiser des pieces moulees de grandes dimensions en materiau composite, moule obtenu au moyen de ce procede et piece polymerisee obtenue au moyen de ce moule
FR2698910A1 (fr) Tambour acoustique d'une seule pièce à l'entrée d'un moteur.
CA2232097C (fr) Procede de realisation de pieces creuses de precision en materiau composite
FR2460779A1 (fr) Procede de fabrication d'une structure alveolaire d'insonorisation et structure ainsi fabriquee
CH625465A5 (https=)
FR3050138B1 (fr) Panneau multicouches
EP0028975B1 (fr) Dispositif pour la réalisation d'un verre composite, en particulier lentille ophtalmique
FR2477824A1 (fr) Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse
FR2664852A1 (fr) Procede de realisation de preformes fibreuses formees par un empilement de strates comportant de petits rayons de courbure pour la fabrication de pieces en materiau composite.
EP2393648A1 (fr) Procede de fabrication d'un reseau de conduits de drainage et panneau pour le traitement acoustique comportant un tel reseau de conduits de drainage
WO2014106713A1 (fr) Membrane de haut-parleur, et procede de fabrication d'une telle membrane
FR2598648A1 (fr) Moule pour la fabrication de pieces composites, et procede en vue de son obtention
EP1683552A1 (fr) Raquette de tennis de table
CN203101675U (zh) 一种偏光镜片的结构
FR2562369A1 (fr) Procede de fabrication d'un diaphragme de transducteur en materiau polymere comprenant des parties de rigidites differentes et diaphragme obtenu par ce procede
FR2504520A1 (fr) Materiau formable d'isolation et d'absorption acoustiques et son procede de formage
FR2990430A1 (fr) Procede de mise en forme d'une feuille de verre et miroir comportant une telle feuille de verre
FR2853803A1 (fr) Membrane pour haut-parleur d'enceinte acoustique haute fidelite, multicouches, multimateriaux
FR2802759A1 (fr) Procede de fabrication d'un materiau absorbant d'ondes mecaniques de surface, materiau absorbant d'ondes mecaniques de surface et transducteur electroacoustique ainsi obtenu
FR2820714A1 (fr) Noyau surf usine
FR2820713A1 (fr) Noyau surf a evidements debouchants

Legal Events

Date Code Title Description
ST Notification of lapse