JPS6472699A - Speaker diaphragm and its manufacture - Google Patents
Speaker diaphragm and its manufactureInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-09-12 JP JP22911087A patent/JPS6472699A/en active Pending
Patent Citations (3)
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)
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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