JPS57190495A - Manufacture of loudspeaker diaphragm - Google Patents

Manufacture of loudspeaker diaphragm

Info

Publication number
JPS57190495A
JPS57190495A JP7525581A JP7525581A JPS57190495A JP S57190495 A JPS57190495 A JP S57190495A JP 7525581 A JP7525581 A JP 7525581A JP 7525581 A JP7525581 A JP 7525581A JP S57190495 A JPS57190495 A JP S57190495A
Authority
JP
Japan
Prior art keywords
titanium
diaphragm
nitriding
homogeneous
internal loss
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
JP7525581A
Other languages
Japanese (ja)
Inventor
Toshikatsu Kuwahata
Takashi Yamamoto
Toshihiro Fukuhara
Yoshiaki Suzuki
Hajime Tanno
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP7525581A priority Critical patent/JPS57190495A/en
Publication of JPS57190495A publication Critical patent/JPS57190495A/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)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To make a diaphragm homogeneously have a quick propagation speed and a suitable internal loss, by forming a homogeneous nitriding layer on both surfaces of a titanium foil diaphragm. CONSTITUTION:A nitriding substance is formed on the surface of a titanium foil by executing a vacuum suction, raising a temperature in a ratio of 10 deg.C/min, leading nitrogen gas into a furnace as soon as a temperature reaches 820 deg.C, and heating (in a nitrogen air current) for one hour at 820 deg.C. Comparison of characteristics in a tweeter of diaphragms of titanium 2 and titanium nitride 1 which have been formed in this way become as whon in the figure, and in case of titanium nitride 1, a smooth characteristic can be obtained. In this way, a nitride layer being homogeneous and having constant thickness is formed, therefore, a physical property of the diaphragm takes a constant value, and an acoustic characteristic of a loudspeaker is remarkably improved. Also, since the nitriding substance is a porous layer consisting of a columnar polycrystal, a large internal loss is obtained.
JP7525581A 1981-05-19 1981-05-19 Manufacture of loudspeaker diaphragm Pending JPS57190495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7525581A JPS57190495A (en) 1981-05-19 1981-05-19 Manufacture of loudspeaker diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7525581A JPS57190495A (en) 1981-05-19 1981-05-19 Manufacture of loudspeaker diaphragm

Publications (1)

Publication Number Publication Date
JPS57190495A true JPS57190495A (en) 1982-11-24

Family

ID=13570921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7525581A Pending JPS57190495A (en) 1981-05-19 1981-05-19 Manufacture of loudspeaker diaphragm

Country Status (1)

Country Link
JP (1) JPS57190495A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185489A (en) * 1984-03-02 1985-09-20 Onkyo Corp Diaphragm for electroacoustic transducer
JPS60186196A (en) * 1984-03-05 1985-09-21 Onkyo Corp Diaphragm for electroacoustic transducer and its manufacture
JPS6162297A (en) * 1984-09-03 1986-03-31 Matsushita Electric Ind Co Ltd Manufacturing method of diaphragm for speaker
JPS6192096A (en) * 1984-10-11 1986-05-10 Onkyo Corp Manufacture of diaphragm for electroacoustic transducer
JPS63241157A (en) * 1988-03-12 1988-10-06 Ohara:Kk Nitriding treatment of titanium product

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250139A (en) * 1975-10-20 1977-04-21 Omron Tateisi Electronics Co Electronic cash register
JPS5421088A (en) * 1977-07-18 1979-02-16 Bonin Pete J Jun Towing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250139A (en) * 1975-10-20 1977-04-21 Omron Tateisi Electronics Co Electronic cash register
JPS5421088A (en) * 1977-07-18 1979-02-16 Bonin Pete J Jun Towing machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185489A (en) * 1984-03-02 1985-09-20 Onkyo Corp Diaphragm for electroacoustic transducer
JPS60186196A (en) * 1984-03-05 1985-09-21 Onkyo Corp Diaphragm for electroacoustic transducer and its manufacture
JPS6162297A (en) * 1984-09-03 1986-03-31 Matsushita Electric Ind Co Ltd Manufacturing method of diaphragm for speaker
JPS6192096A (en) * 1984-10-11 1986-05-10 Onkyo Corp Manufacture of diaphragm for electroacoustic transducer
JPS63241157A (en) * 1988-03-12 1988-10-06 Ohara:Kk Nitriding treatment of titanium product

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