JPS54111818A - Diaphragm of acoustic transducers and production of the same - Google Patents

Diaphragm of acoustic transducers and production of the same

Info

Publication number
JPS54111818A
JPS54111818A JP1846078A JP1846078A JPS54111818A JP S54111818 A JPS54111818 A JP S54111818A JP 1846078 A JP1846078 A JP 1846078A JP 1846078 A JP1846078 A JP 1846078A JP S54111818 A JPS54111818 A JP S54111818A
Authority
JP
Japan
Prior art keywords
diaphragm
same
parts
boron
acoustic transducers
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
JP1846078A
Other languages
Japanese (ja)
Inventor
Toshio Haneda
Toshitaka Sugimoto
Toru Mori
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1846078A priority Critical patent/JPS54111818A/en
Publication of JPS54111818A publication Critical patent/JPS54111818A/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
    • 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 produce a diaphragm of low density and high elasticity for acoustic transducers by molding the mixture of boron compound powder and aluminum (or magnesium) powder to a desired shape and sintering the same. CONSTITUTION:100 parts of boron compound (boron, boron nitride, lanthanum hesaboride, etc.) of particle sizes 0.05 to 5mu (a), 20 to 60 parts of aluminum (or magnesium) of nearly the same sizes (b) and 20 to 30 parts of a lubricating and kneading agent which evaporates during sintering (e.g., paraffin) (c) are mixed and this is flowed into the molding molds of a desired shape and is subjected to heating and pressing for about 1 to 10 minutes under the conditions of vacuum degrees 3 X 10<-1> to 5 X 10<-3> torr, pressures 200 to 1000 kg/cm<3> and temperatues 300 to 600 deg.C, whereby the diaphragm composed of the sintered body having the properties of densities 2.3 to 2.5 g/cm<3>, voids 60 to 80% and modulus of elasticity of 20 X 10<10> to 25 X 10<10>(N/m<2>) is obtained.
JP1846078A 1978-02-22 1978-02-22 Diaphragm of acoustic transducers and production of the same Pending JPS54111818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1846078A JPS54111818A (en) 1978-02-22 1978-02-22 Diaphragm of acoustic transducers and production of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1846078A JPS54111818A (en) 1978-02-22 1978-02-22 Diaphragm of acoustic transducers and production of the same

Publications (1)

Publication Number Publication Date
JPS54111818A true JPS54111818A (en) 1979-09-01

Family

ID=11972236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1846078A Pending JPS54111818A (en) 1978-02-22 1978-02-22 Diaphragm of acoustic transducers and production of the same

Country Status (1)

Country Link
JP (1) JPS54111818A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56141693A (en) * 1980-04-08 1981-11-05 Onkyo Corp Speaker diaphragm having honey-comb structure
JPS56141694A (en) * 1980-04-08 1981-11-05 Onkyo Corp Speaker diaphragm having honey-comb structure
JPS56143794A (en) * 1980-04-08 1981-11-09 Onkyo Corp Diaphragm for speaker
JPS56143798A (en) * 1980-04-08 1981-11-09 Onkyo Corp Composite diaphragm for speaker
WO2006056871A3 (en) * 2004-11-26 2006-08-03 Element Six Ltd Composite material comprising ultra-hard particles embedded in a metal or metal alloy matrix and diaphragm made thereof
WO2015175897A1 (en) 2014-05-15 2015-11-19 Materion Corporation Metal matrix composite materials for acoustic applications

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56141693A (en) * 1980-04-08 1981-11-05 Onkyo Corp Speaker diaphragm having honey-comb structure
JPS56141694A (en) * 1980-04-08 1981-11-05 Onkyo Corp Speaker diaphragm having honey-comb structure
JPS56143794A (en) * 1980-04-08 1981-11-09 Onkyo Corp Diaphragm for speaker
JPS56143798A (en) * 1980-04-08 1981-11-09 Onkyo Corp Composite diaphragm for speaker
WO2006056871A3 (en) * 2004-11-26 2006-08-03 Element Six Ltd Composite material comprising ultra-hard particles embedded in a metal or metal alloy matrix and diaphragm made thereof
WO2015175897A1 (en) 2014-05-15 2015-11-19 Materion Corporation Metal matrix composite materials for acoustic applications
EP3143621A4 (en) * 2014-05-15 2018-04-25 Materion Corporation Metal matrix composite materials for acoustic applications

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