JPS6472699A - Speaker diaphragm and its manufacture - Google Patents

Speaker diaphragm and its manufacture

Info

Publication number
JPS6472699A
JPS6472699A JP22911087A JP22911087A JPS6472699A JP S6472699 A JPS6472699 A JP S6472699A JP 22911087 A JP22911087 A JP 22911087A JP 22911087 A JP22911087 A JP 22911087A JP S6472699 A JPS6472699 A JP S6472699A
Authority
JP
Japan
Prior art keywords
sic
speaker diaphragm
speaker
carbon
alumina
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
JP22911087A
Other languages
Japanese (ja)
Inventor
Nobuo Tomiyake
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP22911087A priority Critical patent/JPS6472699A/en
Publication of JPS6472699A publication Critical patent/JPS6472699A/en
Pending legal-status Critical Current

Links

Landscapes

  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To obtain the speaker of high quality in which frequency characteristic is improved, by forming it only by SiC. CONSTITUTION:Carbon (isotropic graphite) 1 which is comparatively easy to be processed is processed in a prescribed shape and the prescribed thickness of SiC 2 is adhered on the carbon 1 of the prescribed shape by a CVD, whereby the carbon 1 is burnt to be removed. Consequently, a speaker diaphragm formed only by SiC 2 can easily be obtained. Since the acoustic velocity of the speaker diaphragm formed only by SiC is 11.16km/sec (density 3.21X10<3>kg/M<3> and Young's modulus 4.0X10<6>kgf/cm<2>), and it is superior to the acoustic velocity of alumina 9.4km/sec, the speaker having wider band and higher quality than the speaker diaphragm of fine ceramic, which consists only of alumina, can be obtained.
JP22911087A 1987-09-12 1987-09-12 Speaker diaphragm and its manufacture Pending JPS6472699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22911087A JPS6472699A (en) 1987-09-12 1987-09-12 Speaker diaphragm and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22911087A JPS6472699A (en) 1987-09-12 1987-09-12 Speaker diaphragm and its manufacture

Publications (1)

Publication Number Publication Date
JPS6472699A true JPS6472699A (en) 1989-03-17

Family

ID=16886898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22911087A Pending JPS6472699A (en) 1987-09-12 1987-09-12 Speaker diaphragm and its manufacture

Country Status (1)

Country Link
JP (1) JPS6472699A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828567A (en) * 1996-11-07 1998-10-27 Rosemount Inc. Diagnostics for resistance based transmitter
US6859755B2 (en) 2001-05-14 2005-02-22 Rosemount Inc. Diagnostics for industrial process control and measurement systems
US8898036B2 (en) 2007-08-06 2014-11-25 Rosemount Inc. Process variable transmitter with acceleration sensor
US9052240B2 (en) 2012-06-29 2015-06-09 Rosemount Inc. Industrial process temperature transmitter with sensor stress diagnostics
US9207670B2 (en) 2011-03-21 2015-12-08 Rosemount Inc. Degrading sensor detection implemented within a transmitter
US9602122B2 (en) 2012-09-28 2017-03-21 Rosemount Inc. Process variable measurement noise diagnostic

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60219895A (en) * 1984-04-16 1985-11-02 Matsushita Electric Ind Co Ltd Manufacture of diaphragm for speaker
JPS61253366A (en) * 1985-04-30 1986-11-11 Mitsui Eng & Shipbuild Co Ltd Production of reaction sintering sic
JPS63172596A (en) * 1987-01-09 1988-07-16 Matsushita Electric Ind Co Ltd Manufacture of speaker diaphragm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60219895A (en) * 1984-04-16 1985-11-02 Matsushita Electric Ind Co Ltd Manufacture of diaphragm for speaker
JPS61253366A (en) * 1985-04-30 1986-11-11 Mitsui Eng & Shipbuild Co Ltd Production of reaction sintering sic
JPS63172596A (en) * 1987-01-09 1988-07-16 Matsushita Electric Ind Co Ltd Manufacture of speaker diaphragm

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828567A (en) * 1996-11-07 1998-10-27 Rosemount Inc. Diagnostics for resistance based transmitter
US6859755B2 (en) 2001-05-14 2005-02-22 Rosemount Inc. Diagnostics for industrial process control and measurement systems
US8898036B2 (en) 2007-08-06 2014-11-25 Rosemount Inc. Process variable transmitter with acceleration sensor
US9207670B2 (en) 2011-03-21 2015-12-08 Rosemount Inc. Degrading sensor detection implemented within a transmitter
US9052240B2 (en) 2012-06-29 2015-06-09 Rosemount Inc. Industrial process temperature transmitter with sensor stress diagnostics
US9602122B2 (en) 2012-09-28 2017-03-21 Rosemount Inc. Process variable measurement noise diagnostic

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