JPS5553995A - Diaphragm for acoustic apparatus - Google Patents

Diaphragm for acoustic apparatus

Info

Publication number
JPS5553995A
JPS5553995A JP12816878A JP12816878A JPS5553995A JP S5553995 A JPS5553995 A JP S5553995A JP 12816878 A JP12816878 A JP 12816878A JP 12816878 A JP12816878 A JP 12816878A JP S5553995 A JPS5553995 A JP S5553995A
Authority
JP
Japan
Prior art keywords
fiber
diaphragm
synthetic pulp
elastic modulus
synthetic
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
JP12816878A
Other languages
Japanese (ja)
Other versions
JPS5740718B2 (en
Inventor
Hirotoshi Niiguchi
Mitsuru Yashiro
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP12816878A priority Critical patent/JPS5553995A/en
Priority to DE2941644A priority patent/DE2941644C2/en
Priority to US06/085,204 priority patent/US4291781A/en
Priority to GB7935835A priority patent/GB2037122B/en
Publication of JPS5553995A publication Critical patent/JPS5553995A/en
Publication of JPS5740718B2 publication Critical patent/JPS5740718B2/ja
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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To increase the elastic modulus by selecting the beating degree of the synthetic pulp at the specific level, thus obtaining a diaphragm for the acoustic apparatus featuring a wide-band operation. CONSTITUTION:The synthetic pulp in which the Canadian freeness and the fiber length are adjusted to 250-150ml and 1-0.1mm respectively is used for the diaphragm made of the complex comprising the synthetic pulp plus the fibers such as the inorganic fiber, the organic synthetic fiber, the natural fiber and the like. The carbon fiber or the like featuring a fixed length is compounded in a fixed rate to the synthetic pulp of such composition to produce the composite sheet and then undergoes the press molding via the metal mold after the prescribed heat treatment. Thus the diaphragm is obtained. With use of such siaphragm, the elastic modulus is enhanced along with the increased sound pressure frequency characteristics ensured over a wide band.
JP12816878A 1978-10-17 1978-10-17 Diaphragm for acoustic apparatus Granted JPS5553995A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP12816878A JPS5553995A (en) 1978-10-17 1978-10-17 Diaphragm for acoustic apparatus
DE2941644A DE2941644C2 (en) 1978-10-17 1979-10-15 Loudspeaker cone and process for their manufacture
US06/085,204 US4291781A (en) 1978-10-17 1979-10-16 Speaker diaphragm and method of preparation of the same
GB7935835A GB2037122B (en) 1978-10-17 1979-10-16 Speaker diaphragm and method of preparation of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12816878A JPS5553995A (en) 1978-10-17 1978-10-17 Diaphragm for acoustic apparatus

Publications (2)

Publication Number Publication Date
JPS5553995A true JPS5553995A (en) 1980-04-19
JPS5740718B2 JPS5740718B2 (en) 1982-08-30

Family

ID=14978071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12816878A Granted JPS5553995A (en) 1978-10-17 1978-10-17 Diaphragm for acoustic apparatus

Country Status (1)

Country Link
JP (1) JPS5553995A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359132A (en) * 1981-05-14 1982-11-16 Albany International Corp. High performance speaker diaphragm
JPS5833397A (en) * 1981-08-20 1983-02-26 Matsushita Electric Ind Co Ltd Diaphragm for loudspeaker
JPS5839197A (en) * 1981-09-01 1983-03-07 Matsushita Electric Ind Co Ltd Diaphragm for speaker
JPS5869196A (en) * 1981-10-20 1983-04-25 Matsushita Electric Ind Co Ltd Diaphragm for speaker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4895817A (en) * 1972-03-18 1973-12-08
JPS5046123A (en) * 1973-08-27 1975-04-24
JPS5255518A (en) * 1975-10-31 1977-05-07 Fuji Photo Film Co Ltd Production of speaker cone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4895817A (en) * 1972-03-18 1973-12-08
JPS5046123A (en) * 1973-08-27 1975-04-24
JPS5255518A (en) * 1975-10-31 1977-05-07 Fuji Photo Film Co Ltd Production of speaker cone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359132A (en) * 1981-05-14 1982-11-16 Albany International Corp. High performance speaker diaphragm
JPS5833397A (en) * 1981-08-20 1983-02-26 Matsushita Electric Ind Co Ltd Diaphragm for loudspeaker
JPS5839197A (en) * 1981-09-01 1983-03-07 Matsushita Electric Ind Co Ltd Diaphragm for speaker
JPS5869196A (en) * 1981-10-20 1983-04-25 Matsushita Electric Ind Co Ltd Diaphragm for speaker

Also Published As

Publication number Publication date
JPS5740718B2 (en) 1982-08-30

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