US3856995A - Pressure gradient piezoelectric microphone - Google Patents
Pressure gradient piezoelectric microphone Download PDFInfo
- Publication number
- US3856995A US3856995A US00359300A US35930073A US3856995A US 3856995 A US3856995 A US 3856995A US 00359300 A US00359300 A US 00359300A US 35930073 A US35930073 A US 35930073A US 3856995 A US3856995 A US 3856995A
- Authority
- US
- United States
- Prior art keywords
- disc
- pressure gradient
- piezoelectric
- cylinder
- transducer
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 12
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000002131 composite material Substances 0.000 abstract description 5
- 239000000919 ceramic Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- -1 Permalloy D Chemical compound 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 208000021728 developmental and epileptic encephalopathy 24 Diseases 0.000 description 1
- 208000023874 developmental and epileptic encephalopathy, 24 Diseases 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
Definitions
- FIG. 1 is a sectioned side view of a first construction of a pressure gradient microphone
- the composite disc 10, 13 together with electrodes II and 12 and lead wires 8a and 8b, constitute the piezoelectric disc transducer element of the microphone.
- the polarized disc 14 is bonded face to face with the disc 10 so that the adjacent electrodes, one on each disc, are conductively joined.
- the disc 14 may be bonded to the disc 10 so that the respective polarities are opposite (FIG. 5) in which case two lead wires 8a and 81) for external connection are taken one from each of the two outer electrodes.
- a pressure gradient microphone comprising:
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB50130/70A GB1278009A (en) | 1970-10-22 | 1970-10-22 | Microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3856995A true US3856995A (en) | 1974-12-24 |
Family
ID=10454774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00359300A Expired - Lifetime US3856995A (en) | 1970-10-22 | 1973-05-11 | Pressure gradient piezoelectric microphone |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3856995A (fr) |
| AU (1) | AU3470771A (fr) |
| DE (1) | DE2152025A1 (fr) |
| FR (1) | FR2111759B1 (fr) |
| GB (1) | GB1278009A (fr) |
| IL (1) | IL38042A0 (fr) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995124A (en) * | 1974-09-25 | 1976-11-30 | Saad Zaghloul Mohamed Gabr | Noise cancelling microphone |
| US4020448A (en) * | 1973-09-17 | 1977-04-26 | James Patrick Corbett | Oscillating crystal transducer systems |
| US4413198A (en) * | 1981-12-30 | 1983-11-01 | Motorola, Inc. | Piezoelectric transducer apparatus |
| US6272360B1 (en) * | 1997-07-03 | 2001-08-07 | Pan Communications, Inc. | Remotely installed transmitter and a hands-free two-way voice terminal device using same |
| US20030046554A1 (en) * | 2001-08-31 | 2003-03-06 | Leydier Robert A. | Voice activated smart card |
| US20100295419A1 (en) * | 2009-05-19 | 2010-11-25 | Yasuhisa Fujii | Electric power device, electric power generation method, and production method of electric power device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2536622B1 (fr) * | 1982-11-19 | 1986-03-07 | Thomson Csf | Hydrophone de vitesse |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2463762A (en) * | 1941-11-14 | 1949-03-08 | Automatic Elect Lab | Electroacoustical transducer |
| US2967957A (en) * | 1957-09-17 | 1961-01-10 | Massa Frank | Electroacoustic transducer |
| CA748567A (en) * | 1966-12-13 | D. Ibbotson Thomas | Electro-acoustic transducers | |
| US3662124A (en) * | 1967-06-05 | 1972-05-09 | Willco Horgerate Medizinische | Directional microphone for hearing aid |
-
1970
- 1970-10-22 GB GB50130/70A patent/GB1278009A/en not_active Expired
-
1971
- 1971-10-18 AU AU34707/71A patent/AU3470771A/en not_active Expired
- 1971-10-18 FR FR7137268A patent/FR2111759B1/fr not_active Expired
- 1971-10-19 DE DE19712152025 patent/DE2152025A1/de active Pending
- 1971-10-29 IL IL38042A patent/IL38042A0/xx unknown
-
1973
- 1973-05-11 US US00359300A patent/US3856995A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA748567A (en) * | 1966-12-13 | D. Ibbotson Thomas | Electro-acoustic transducers | |
| US2463762A (en) * | 1941-11-14 | 1949-03-08 | Automatic Elect Lab | Electroacoustical transducer |
| US2967957A (en) * | 1957-09-17 | 1961-01-10 | Massa Frank | Electroacoustic transducer |
| US3662124A (en) * | 1967-06-05 | 1972-05-09 | Willco Horgerate Medizinische | Directional microphone for hearing aid |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4020448A (en) * | 1973-09-17 | 1977-04-26 | James Patrick Corbett | Oscillating crystal transducer systems |
| US3995124A (en) * | 1974-09-25 | 1976-11-30 | Saad Zaghloul Mohamed Gabr | Noise cancelling microphone |
| US4413198A (en) * | 1981-12-30 | 1983-11-01 | Motorola, Inc. | Piezoelectric transducer apparatus |
| US6272360B1 (en) * | 1997-07-03 | 2001-08-07 | Pan Communications, Inc. | Remotely installed transmitter and a hands-free two-way voice terminal device using same |
| US20030046554A1 (en) * | 2001-08-31 | 2003-03-06 | Leydier Robert A. | Voice activated smart card |
| US8266451B2 (en) * | 2001-08-31 | 2012-09-11 | Gemalto Sa | Voice activated smart card |
| US20100295419A1 (en) * | 2009-05-19 | 2010-11-25 | Yasuhisa Fujii | Electric power device, electric power generation method, and production method of electric power device |
| US8736146B2 (en) * | 2009-05-19 | 2014-05-27 | Empire Technology Development Llc | Electric power device, electric power generation method, and production method of electric power device |
Also Published As
| Publication number | Publication date |
|---|---|
| IL38042A0 (en) | 1972-03-28 |
| FR2111759B1 (fr) | 1976-12-03 |
| GB1278009A (en) | 1972-06-14 |
| FR2111759A1 (fr) | 1972-06-09 |
| AU3470771A (en) | 1973-05-03 |
| DE2152025A1 (de) | 1972-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1071750A (fr) | Transducteur a couche piezoelectrique mince a courbures alternees | |
| US2403692A (en) | Piezoelectric device | |
| US3781492A (en) | Headset | |
| US2069242A (en) | Electroacoustic energy converting system | |
| JPS5840999A (ja) | 圧電ポリマ−式電気音響学的変換器 | |
| EP0276996A2 (fr) | Microphone | |
| US3439128A (en) | Miniature ceramic microphone | |
| US5117403A (en) | Above and below water sound transducer | |
| US4379211A (en) | Arcuately tensioned piezoelectric diaphragm microphone | |
| JPS5911237B2 (ja) | 圧電スピ−カ | |
| US3856995A (en) | Pressure gradient piezoelectric microphone | |
| CA1199719A (fr) | Transducteur a ultra-sons piezoelectrique a suspension amortie | |
| US3573397A (en) | Acoustic diaphragm and translating device utilizing same | |
| US3896274A (en) | Electret earphone | |
| US3654402A (en) | Transducer for converting acoustic vibrations into electrical oscillations, and vice versa, in the form of a diaphragm coated with at least one layer of a piezo-electric material | |
| US3732446A (en) | Electroacoustic transducer resistant to external mechanical vibrations | |
| US3130275A (en) | Microphone | |
| US2496483A (en) | Loud-speaker with diaphragm an integral part of outer casing | |
| US2327136A (en) | Hearing aid microphone | |
| US3731124A (en) | Electroacoustic transducer having improved transducing element supporting means | |
| US2796467A (en) | Directional transducer | |
| US3251953A (en) | Electro-acoustic transducer | |
| JPS5816317Y2 (ja) | 複台型スピ−カ | |
| RU2014758C1 (ru) | Электроакустический преобразователь | |
| JPH1169472A (ja) | スピーカの防水構造及びこれに用いられる２次振動板 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: STC PLC, 10 MALTRAVERS STREET, LONDON, WC2R 3HA, E Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A DE CORP.;REEL/FRAME:004761/0721 Effective date: 19870423 Owner name: STC PLC,ENGLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A DE CORP.;REEL/FRAME:004761/0721 Effective date: 19870423 |