SE457924B - Akustisk riktningsomvandlare, som innefattar en motelektrod och en elektretfolie - Google Patents

Akustisk riktningsomvandlare, som innefattar en motelektrod och en elektretfolie

Info

Publication number
SE457924B
SE457924B SE8206385A SE8206385A SE457924B SE 457924 B SE457924 B SE 457924B SE 8206385 A SE8206385 A SE 8206385A SE 8206385 A SE8206385 A SE 8206385A SE 457924 B SE457924 B SE 457924B
Authority
SE
Sweden
Prior art keywords
foil
electret
layer
counter electrode
length
Prior art date
Application number
SE8206385A
Other languages
English (en)
Swedish (sv)
Other versions
SE8206385L (sv
SE8206385D0 (sv
Inventor
I J Busch-Vishniac
Jr R L Wallace
J E West
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of SE8206385D0 publication Critical patent/SE8206385D0/xx
Publication of SE8206385L publication Critical patent/SE8206385L/
Publication of SE457924B publication Critical patent/SE457924B/sv

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
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49226—Electret making

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Pressure Sensors (AREA)
SE8206385A 1981-11-20 1982-11-10 Akustisk riktningsomvandlare, som innefattar en motelektrod och en elektretfolie SE457924B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/323,669 US4429191A (en) 1981-11-20 1981-11-20 Electret transducer with variably charged electret foil

Publications (3)

Publication Number Publication Date
SE8206385D0 SE8206385D0 (sv) 1982-11-10
SE8206385L SE8206385L (sv) 1983-05-21
SE457924B true SE457924B (sv) 1989-02-06

Family

ID=23260213

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8206385A SE457924B (sv) 1981-11-20 1982-11-10 Akustisk riktningsomvandlare, som innefattar en motelektrod och en elektretfolie

Country Status (7)

Country Link
US (1) US4429191A (ja)
JP (1) JPH0648878B2 (ja)
CA (1) CA1185694A (ja)
DE (1) DE3242561A1 (ja)
FR (1) FR2517159B1 (ja)
NL (1) NL8204514A (ja)
SE (1) SE457924B (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101543A (en) * 1990-07-02 1992-04-07 Gentex Corporation Method of making a variable capacitor microphone
US5388163A (en) * 1991-12-23 1995-02-07 At&T Corp. Electret transducer array and fabrication technique
US5473683A (en) * 1992-02-13 1995-12-05 Northern Telecom Limited Post assembly process for adjusting the gain of an electret microphone within a communications apparatus
US6937736B2 (en) * 2001-08-06 2005-08-30 Measurement Specialties, Inc. Acoustic sensor using curved piezoelectric film
JP6547272B2 (ja) * 2014-10-16 2019-07-24 ヤマハ株式会社 電気音響変換器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR874440A (fr) * 1940-02-12 1942-08-06 Atlas Werke Ag Appareil pour émissions ou réceptions dirigées d'énergie ondulatoire
US3372245A (en) * 1963-01-25 1968-03-05 Matsushita Electric Ind Co Ltd Electrostatic electro-acoustic transducer
US3588382A (en) * 1967-10-11 1971-06-28 Northern Electric Co Directional electret transducer
SE7411457L (ja) * 1973-09-15 1975-03-17 Bowers And Wilkins Electronics
JPS5593180U (ja) * 1978-12-19 1980-06-27
US4311874A (en) * 1979-12-17 1982-01-19 Bell Telephone Laboratories, Incorporated Teleconference microphone arrays

Also Published As

Publication number Publication date
NL8204514A (nl) 1983-06-16
CA1185694A (en) 1985-04-16
DE3242561A1 (de) 1983-06-23
DE3242561C2 (ja) 1993-08-26
FR2517159B1 (fr) 1985-10-25
SE8206385L (sv) 1983-05-21
SE8206385D0 (sv) 1982-11-10
JPS5896496A (ja) 1983-06-08
US4429191A (en) 1984-01-31
FR2517159A1 (fr) 1983-05-27
JPH0648878B2 (ja) 1994-06-22

Similar Documents

Publication Publication Date Title
SE454124B (sv) Akustisk omvandlare innefattande en elektretfolie och en motelektrodplatta med en metallyta
SE453552B (sv) Akustisk omvandlare innefattande en elektretfolie och en metalliserad motelektrodplatta
CA1173552A (en) Electret transducer
Snyder Radiation on losses due to variations of radius dielectric or optical fibers
SE453349B (sv) Akustisk omvandlare med ett riktningsdiagram innehallande en huvudlob och ett flertal i huvudsak vid en forutbestemd troskelniva liggande sidolober
SE457924B (sv) Akustisk riktningsomvandlare, som innefattar en motelektrod och en elektretfolie
US4245329A (en) Elongated seismic receiver of continuous structure
SE454123B (sv) Akustisk riktningsomvandlare innefattande en elektretfolie, som har en metallyta och som strecker sig over en motelektrodplatta, som har en metallyta
DE69719184D1 (de) Kabelzusammenbau für elektrische Signalleitungen
US2536802A (en) Accelerometer
US4458161A (en) Electret device
GB2110054A (en) Directional acoustic transducers
US3321699A (en) Device for quadratically converting a linear displacement into an electrical quantity
FR2646309B1 (fr) Procede de fabrication d'un capteur acoustique et capteur acoustique ainsi obtenu, a couche de protection indecollable
RU2781805C1 (ru) Датчик низкоамплитудных апериодических вибраций на основе пленочного чувствительного элемента
US2908772A (en) Electroacoustical transducer
SU1760649A1 (ru) Электростатический преобразователь
CA2100146A1 (en) Apparatus with interconnection arrangement
Warne et al. A radial transmission line material measurement apparatus
Atkinson et al. Some observations of corona starting voltages on unsymmetrical dielectric assemblies
Miyata et al. Study of effect of electrode materials on space charge characteristics
JPS61116664A (ja) 電圧検出器
RU95104145A (ru) Способ измерения вибраций

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 8206385-0

Format of ref document f/p: F

NUG Patent has lapsed

Ref document number: 8206385-0

Format of ref document f/p: F