JPS57106296A - Acoustic material and the manufacturing method - Google Patents

Acoustic material and the manufacturing method

Info

Publication number
JPS57106296A
JPS57106296A JP18359680A JP18359680A JPS57106296A JP S57106296 A JPS57106296 A JP S57106296A JP 18359680 A JP18359680 A JP 18359680A JP 18359680 A JP18359680 A JP 18359680A JP S57106296 A JPS57106296 A JP S57106296A
Authority
JP
Japan
Prior art keywords
elastic fiber
dambi
high elastic
mixed
compound material
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
JP18359680A
Other languages
Japanese (ja)
Inventor
Yasuhiro Ishii
Yasushi Miyoshi
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP18359680A priority Critical patent/JPS57106296A/en
Publication of JPS57106296A publication Critical patent/JPS57106296A/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 obtain an acoustic material with high rigidity, to difficult generate resonance and maintaining flatness of frequency characteristics, by mixing high elastic fiber with a compound material to strengthen and by molding or foam molding this. CONSTITUTION:>=one or two kinds of high elastic fiber of carbon fibers are cut with approx. 0.1-10mm. and stirred and mixed in a melting solvent of pellet of ''DAMBI '' which is the compound material grown up to the modified twin crystal by mixing polyamide resin, lead powder and nucleating agent. After that, it is poured into the mold of the speaker diaphragm and is heated, pressured and molded to obtain the desired formed speaker diaphragm. When a high elastic fiber is mixed with the compound material ''DAMBI '', pyrolysis type foamin agent such as azodicarbonamide is mixed, for example, it is poured into the mold of the speaker diaphragm and foaming is performed simultaneously when it is heated, pressured and molded to obtain a speaker having air bubbles. Fiber reinforcing composite body (c) which is composed of ''DAMBI '' and high elastic fiber and the air bubbling body (d) provide high rigidity and high logarithmic decrement characteristics.
JP18359680A 1980-12-23 1980-12-23 Acoustic material and the manufacturing method Pending JPS57106296A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18359680A JPS57106296A (en) 1980-12-23 1980-12-23 Acoustic material and the manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18359680A JPS57106296A (en) 1980-12-23 1980-12-23 Acoustic material and the manufacturing method

Publications (1)

Publication Number Publication Date
JPS57106296A true JPS57106296A (en) 1982-07-02

Family

ID=16138579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18359680A Pending JPS57106296A (en) 1980-12-23 1980-12-23 Acoustic material and the manufacturing method

Country Status (1)

Country Link
JP (1) JPS57106296A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01229600A (en) * 1988-03-09 1989-09-13 Sumitomo Rubber Ind Ltd Speaker diaphragm
JPH01292998A (en) * 1988-05-19 1989-11-27 Minebea Co Ltd Diaphragm for loudspeaker
CN112399310A (en) * 2020-10-30 2021-02-23 歌尔股份有限公司 Loudspeaker diaphragm and loudspeaker
CN112399309A (en) * 2020-10-30 2021-02-23 歌尔股份有限公司 Loudspeaker diaphragm and loudspeaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01229600A (en) * 1988-03-09 1989-09-13 Sumitomo Rubber Ind Ltd Speaker diaphragm
JPH01292998A (en) * 1988-05-19 1989-11-27 Minebea Co Ltd Diaphragm for loudspeaker
CN112399310A (en) * 2020-10-30 2021-02-23 歌尔股份有限公司 Loudspeaker diaphragm and loudspeaker
CN112399309A (en) * 2020-10-30 2021-02-23 歌尔股份有限公司 Loudspeaker diaphragm and loudspeaker

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