IT1088489B - Trasduttore sonico elettrostatico - Google Patents
Trasduttore sonico elettrostaticoInfo
- Publication number
- IT1088489B IT1088489B IT29423/77A IT2942377A IT1088489B IT 1088489 B IT1088489 B IT 1088489B IT 29423/77 A IT29423/77 A IT 29423/77A IT 2942377 A IT2942377 A IT 2942377A IT 1088489 B IT1088489 B IT 1088489B
- Authority
- IT
- Italy
- Prior art keywords
- sonic transducer
- electrostatic
- electrostatic sonic
- transducer
- sonic
- Prior art date
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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/24—Tensioning by means acting directly on free portions of diaphragm or cone
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S367/00—Communications, electrical: acoustic wave systems and devices
- Y10S367/905—Side lobe reduction or shading
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- General Physics & Mathematics (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/741,228 US4081626A (en) | 1976-11-12 | 1976-11-12 | Electrostatic transducer having narrowed directional characteristic |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1088489B true IT1088489B (it) | 1985-06-10 |
Family
ID=24979863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT29423/77A IT1088489B (it) | 1976-11-12 | 1977-11-08 | Trasduttore sonico elettrostatico |
Country Status (10)
Country | Link |
---|---|
US (1) | US4081626A (it) |
JP (1) | JPS5362519A (it) |
AT (1) | AT371257B (it) |
AU (1) | AU513326B2 (it) |
CA (1) | CA1119710A (it) |
CH (1) | CH626763A5 (it) |
DE (1) | DE2749987C3 (it) |
FR (1) | FR2371115A1 (it) |
GB (1) | GB1589446A (it) |
IT (1) | IT1088489B (it) |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4085297A (en) * | 1977-06-13 | 1978-04-18 | Polaroid Corporation | Spring force biasing means for electroacoustical transducer components |
GB2044037B (en) * | 1978-12-23 | 1983-03-23 | Tokyo Shibaura Electric Co | Electrostatic microphone |
US4246449A (en) * | 1979-04-24 | 1981-01-20 | Polaroid Corporation | Electrostatic transducer having optimum sensitivity and damping |
US4311881A (en) * | 1979-07-05 | 1982-01-19 | Polaroid Corporation | Electrostatic transducer backplate having open ended grooves |
US4317005A (en) * | 1979-10-15 | 1982-02-23 | Bruyne Pieter De | Position-determining system |
JPS5799100A (en) * | 1980-12-12 | 1982-06-19 | Matsushita Electric Works Ltd | Electrostatic type electro-acoustic converter |
JPS5846800A (ja) * | 1981-09-14 | 1983-03-18 | Matsushita Electric Works Ltd | 静電型超音波振動子 |
US4434327A (en) * | 1981-11-20 | 1984-02-28 | Bell Telephone Laboratories, Incorporated | Electret transducer with variable actual air gap |
US4429193A (en) * | 1981-11-20 | 1984-01-31 | Bell Telephone Laboratories, Incorporated | Electret transducer with variable effective air gap |
US4439642A (en) * | 1981-12-28 | 1984-03-27 | Polaroid Corporation | High energy ultrasonic transducer |
US4490814A (en) * | 1982-09-30 | 1984-12-25 | Polaroid Corporation | Sonic autofocus camera having variable sonic beamwidth |
US4440482A (en) * | 1982-09-30 | 1984-04-03 | Polaroid Corporation | Sonic autofocus camera having variable sonic beamwidth |
EP0132039A3 (en) * | 1983-06-09 | 1986-07-23 | Robert Bacon Pepper | Moisture resistant cover for an electroacoustic transducer |
US4887246A (en) * | 1983-09-15 | 1989-12-12 | Ultrasonic Arrays, Inc. | Ultrasonic apparatus, system and method |
AU573655B2 (en) * | 1983-12-05 | 1988-06-16 | Kay, L. | Transducer array |
US4872148A (en) * | 1984-03-08 | 1989-10-03 | Polaroid Corporation | Ultrasonic transducer for use in a corrosive/abrasive environment |
US4695986A (en) * | 1985-03-28 | 1987-09-22 | Ultrasonic Arrays, Inc. | Ultrasonic transducer component and process for making the same and assembly |
US4858203A (en) * | 1985-09-26 | 1989-08-15 | Position Orientation Systems, Inc. | Omnidirectional distance measurement system |
JPS62149299A (ja) * | 1985-12-24 | 1987-07-03 | Agency Of Ind Science & Technol | アレイ型超音波トランスデユ−サ |
CH669676A5 (it) * | 1986-01-23 | 1989-03-31 | Zellweger Uster Ag | |
CA1277415C (en) * | 1986-04-11 | 1990-12-04 | Lorne A. Whitehead | Elastomer membrane enhanced electrostatic transducer |
US4799077A (en) * | 1987-11-23 | 1989-01-17 | Polaroid Corporation | Common drive for shutter blades and objective lens assembly |
WO1989005558A1 (en) * | 1987-12-10 | 1989-06-15 | Ultrasonic Arrays, Inc. | Ultrasonic transducer with tensioned diaphragm and method |
US4980873A (en) * | 1987-12-10 | 1990-12-25 | Gross William C | Ultrasonic transducer with tensioned diaphragm and method |
US4887248A (en) * | 1988-07-07 | 1989-12-12 | Cleveland Machine Controls, Inc. | Electrostatic transducer and method of making and using same |
US5764782A (en) * | 1993-03-23 | 1998-06-09 | Hayes; Joseph Francis | Acoustic reflector |
US5450498A (en) * | 1993-07-14 | 1995-09-12 | The University Of British Columbia | High pressure low impedance electrostatic transducer |
GB2301507B (en) * | 1994-03-08 | 1997-11-19 | Jonathan Neil Smith | Electromagnetic loudspeaker |
GB9404585D0 (en) * | 1994-03-08 | 1994-04-20 | Smith Jonathan N | Loudspeaker |
US5442595A (en) * | 1994-04-22 | 1995-08-15 | Xecutek Corporation | Capacitance-type ultrasonic transducer |
US5619476A (en) * | 1994-10-21 | 1997-04-08 | The Board Of Trustees Of The Leland Stanford Jr. Univ. | Electrostatic ultrasonic transducer |
US5894452A (en) * | 1994-10-21 | 1999-04-13 | The Board Of Trustees Of The Leland Stanford Junior University | Microfabricated ultrasonic immersion transducer |
US5600610A (en) * | 1995-01-31 | 1997-02-04 | Gas Research Institute | Electrostatic transducer and method for manufacturing same |
DE19626293A1 (de) * | 1996-07-01 | 1998-01-08 | Teves Gmbh Alfred | Ultraschallwandler mit Kontaktglied |
EP0825585B1 (de) * | 1996-08-21 | 2005-07-20 | Volkswagen Aktiengesellschaft | Vorrichtung zur Bestimmung des Abstandes von Objekten |
US5982709A (en) * | 1998-03-31 | 1999-11-09 | The Board Of Trustees Of The Leland Stanford Junior University | Acoustic transducers and method of microfabrication |
JP2000050387A (ja) * | 1998-07-16 | 2000-02-18 | Massachusetts Inst Of Technol <Mit> | パラメトリックオ―ディオシステム |
US6775388B1 (en) | 1998-07-16 | 2004-08-10 | Massachusetts Institute Of Technology | Ultrasonic transducers |
US7391872B2 (en) * | 1999-04-27 | 2008-06-24 | Frank Joseph Pompei | Parametric audio system |
JP2003018696A (ja) * | 2001-06-29 | 2003-01-17 | Azden Corp | エレクトレットコンデンサマイクロホン |
WO2003032678A2 (en) | 2001-10-09 | 2003-04-17 | Frank Joseph Pompei | Ultrasonic transducer for parametric array |
US20040114770A1 (en) * | 2002-10-30 | 2004-06-17 | Pompei Frank Joseph | Directed acoustic sound system |
DE10260307B4 (de) * | 2002-12-20 | 2007-02-22 | Siemens Audiologische Technik Gmbh | Elektroakustischer Miniaturwandler für ein Hörhilfegerät |
US7530952B2 (en) * | 2004-04-01 | 2009-05-12 | The Board Of Trustees Of The Leland Stanford Junior University | Capacitive ultrasonic transducers with isolation posts |
JP4642541B2 (ja) * | 2005-05-06 | 2011-03-02 | 株式会社オーディオテクニカ | マイクロホン |
JP4618165B2 (ja) * | 2006-03-06 | 2011-01-26 | 株式会社デンソー | 超音波センサ |
WO2007115350A1 (en) * | 2006-04-10 | 2007-10-18 | Immersion Technology Property Limited | An electrostatic loudspeaker |
AT509922B1 (de) | 2011-06-24 | 2013-10-15 | Avl List Gmbh | Kapazitiver ultraschallwandler |
EP2858829B1 (en) * | 2012-06-12 | 2021-05-19 | Frank Joseph Pompei | Ultrasonic transducer |
CN203747990U (zh) * | 2013-12-11 | 2014-07-30 | 瑞声光电科技(常州)有限公司 | 扬声器 |
JP6547272B2 (ja) * | 2014-10-16 | 2019-07-24 | ヤマハ株式会社 | 電気音響変換器 |
US10120449B2 (en) | 2015-08-25 | 2018-11-06 | Immersion Corporation | Parallel plate actuator |
WO2017151878A1 (en) * | 2016-03-04 | 2017-09-08 | Frank Joseph Pompei | Ultrasonic transducer with tensioned film |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE452961C (de) * | 1925-11-12 | 1927-11-25 | Eugen Reisz | Resonanzfreie Membran |
DE507741C (de) * | 1929-01-03 | 1930-10-06 | Gustav Hoffmann | Vom Schiessstand aus mittels Seilzuges o. dgl. zu betaetigender Scheibenstand |
FR749076A (fr) * | 1932-07-16 | 1933-07-18 | Microphone | |
US3008013A (en) * | 1954-07-20 | 1961-11-07 | Ferranti Ltd | Electrostatic loudspeakers |
GB849487A (en) * | 1956-03-14 | 1960-09-28 | Telefunken Gmbh | Improvements in or relating to electrostatic sound transducers |
US2910539A (en) * | 1956-07-27 | 1959-10-27 | William L Hartsfield | Microphones |
US3041418A (en) * | 1960-01-14 | 1962-06-26 | Rca Corp | Transducers |
NL281794A (it) * | 1961-08-07 | |||
JPS455746Y1 (it) * | 1965-12-28 | 1970-03-19 | ||
US3430146A (en) * | 1966-11-02 | 1969-02-25 | Admiral Corp | Remote control microphone biasing circuit |
JPS4888018U (it) * | 1972-01-24 | 1973-10-24 | ||
US3816671A (en) * | 1972-04-06 | 1974-06-11 | Thermo Electron Corp | Electret transducer cartridge and case |
US3814864A (en) * | 1972-07-14 | 1974-06-04 | J Victoreen | Condenser microphone having a plurality of discrete vibratory surfaces |
JPS5121791B2 (it) * | 1972-08-04 | 1976-07-05 | ||
JPS50115517A (it) * | 1974-02-20 | 1975-09-10 | ||
JPS50115519A (it) * | 1974-02-20 | 1975-09-10 | ||
US3958662A (en) * | 1975-02-18 | 1976-05-25 | Bell Telephone Laboratories, Incorporated | Tensioned diaphragm mounting for an electroacoustic transducer |
-
1976
- 1976-11-12 US US05/741,228 patent/US4081626A/en not_active Expired - Lifetime
-
1977
- 1977-09-22 AU AU29045/77A patent/AU513326B2/en not_active Expired
- 1977-10-07 CA CA000288308A patent/CA1119710A/en not_active Expired
- 1977-10-13 GB GB42700/77A patent/GB1589446A/en not_active Expired
- 1977-10-28 FR FR7732572A patent/FR2371115A1/fr active Granted
- 1977-11-04 JP JP13162477A patent/JPS5362519A/ja active Granted
- 1977-11-07 AT AT0793277A patent/AT371257B/de not_active IP Right Cessation
- 1977-11-08 DE DE2749987A patent/DE2749987C3/de not_active Expired
- 1977-11-08 IT IT29423/77A patent/IT1088489B/it active
- 1977-11-09 CH CH1368177A patent/CH626763A5/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPS5362519A (en) | 1978-06-05 |
FR2371115A1 (fr) | 1978-06-09 |
ATA793277A (de) | 1982-10-15 |
US4081626A (en) | 1978-03-28 |
AU513326B2 (en) | 1980-11-27 |
DE2749987B2 (de) | 1980-09-04 |
AU2904577A (en) | 1979-03-29 |
FR2371115B1 (it) | 1981-10-23 |
CA1119710A (en) | 1982-03-09 |
CH626763A5 (it) | 1981-11-30 |
DE2749987C3 (de) | 1981-04-16 |
JPS552800B2 (it) | 1980-01-22 |
AT371257B (de) | 1983-06-10 |
DE2749987A1 (de) | 1978-05-18 |
GB1589446A (en) | 1981-05-13 |
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