FR2019236A1 - - Google Patents

Info

Publication number
FR2019236A1
FR2019236A1 FR6933362A FR6933362A FR2019236A1 FR 2019236 A1 FR2019236 A1 FR 2019236A1 FR 6933362 A FR6933362 A FR 6933362A FR 6933362 A FR6933362 A FR 6933362A FR 2019236 A1 FR2019236 A1 FR 2019236A1
Authority
FR
France
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.)
Withdrawn
Application number
FR6933362A
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2019236A1 publication Critical patent/FR2019236A1/fr
Withdrawn legal-status Critical Current

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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/18—Extraction of features or characteristics of the image
    • G06V30/1801—Detecting partial patterns, e.g. edges or contours, or configurations, e.g. loops, corners, strokes or intersections
    • G06V30/18067—Detecting partial patterns, e.g. edges or contours, or configurations, e.g. loops, corners, strokes or intersections by mapping characteristic values of the pattern into a parameter space, e.g. Hough transformation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/40—Document-oriented image-based pattern recognition
    • G06V30/42—Document-oriented image-based pattern recognition based on the type of document
    • G06V30/424—Postal images, e.g. labels or addresses on parcels or postal envelopes
    • 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
    • H04R7/26—Damping by means acting directly on free portion of diaphragm or cone

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
FR6933362A 1968-09-30 1969-09-30 Withdrawn FR2019236A1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6813996A NL6813996A (enrdf_load_stackoverflow) 1968-09-30 1968-09-30

Publications (1)

Publication Number Publication Date
FR2019236A1 true FR2019236A1 (enrdf_load_stackoverflow) 1970-06-26

Family

ID=19804802

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6933362A Withdrawn FR2019236A1 (enrdf_load_stackoverflow) 1968-09-30 1969-09-30

Country Status (6)

Country Link
US (1) US3654402A (enrdf_load_stackoverflow)
AT (1) AT316669B (enrdf_load_stackoverflow)
DE (1) DE1948932A1 (enrdf_load_stackoverflow)
FR (1) FR2019236A1 (enrdf_load_stackoverflow)
GB (1) GB1245030A (enrdf_load_stackoverflow)
NL (1) NL6813996A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2400796A1 (fr) * 1977-08-18 1979-03-16 Mallory & Co Inc P R Transducteur piezoelectrique et procede de reduction de la frequence de resonance d'un transducteur

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937991A (en) * 1970-03-09 1976-02-10 Fred M. Dellorfano, Jr. And Donald P. Massa, Trustees Of The Stoneleigh Trust Electroacoustic transducers of the bilaminar flexural vibrating type and method for manufacturing same
US3777192A (en) * 1970-10-08 1973-12-04 Dynamics Corp Massa Div A method for adjusting the resonant frequency and motional electrical impedance of a vibrating diaphragm electroacoustic transducer
US3786202A (en) * 1972-04-10 1974-01-15 Motorola Inc Acoustic transducer including piezoelectric driving element
JPS5758877Y2 (enrdf_load_stackoverflow) * 1974-02-18 1982-12-16
DE2831362A1 (de) * 1978-07-17 1980-01-31 Siemens Ag Elektroakustischer wandler
DE3005708C2 (de) * 1980-02-15 1984-08-30 Siemens AG, 1000 Berlin und 8000 München Wandlerplatte für piezoelektrische Wandler
US4516428A (en) * 1982-10-28 1985-05-14 Pan Communications, Inc. Acceleration vibration detector
FR2536622B1 (fr) * 1982-11-19 1986-03-07 Thomson Csf Hydrophone de vitesse
GB8519026D0 (en) * 1985-07-27 1985-09-04 Laing J Piezo electrical inertia sensitive device
US4949194A (en) * 1988-02-26 1990-08-14 Quest Technology Corporation Ceramic support arm for movably positioning transducers
BE1011085A4 (nl) * 1997-04-03 1999-04-06 Sonitron Naamloze Vennootschap Element voor het weergeven en/of opnemen van geluid.
BE1011559A4 (nl) * 1997-11-20 1999-10-05 Sonitron Naamloze Vennootschap Element voor het weergeven en/of opnemen van geluid.
JP7434571B2 (ja) * 2020-01-17 2024-02-20 シェンツェン・ショックス・カンパニー・リミテッド マイクロフォン及びそれを有する電子機器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105010A (en) * 1933-02-25 1938-01-11 Brush Dev Co Piezoelectric device
US2207539A (en) * 1939-07-26 1940-07-09 Brush Dev Co Piezoelectric apparatus
US3002179A (en) * 1952-09-03 1961-09-26 Donald W Kuester Low frequency hydrophone
US3030606A (en) * 1953-03-19 1962-04-17 Wilbur T Harris Hollow conical electromechanical transducer
US2967957A (en) * 1957-09-17 1961-01-10 Massa Frank Electroacoustic transducer
US3311761A (en) * 1963-12-26 1967-03-28 Schloss Fred Transducer mounting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2400796A1 (fr) * 1977-08-18 1979-03-16 Mallory & Co Inc P R Transducteur piezoelectrique et procede de reduction de la frequence de resonance d'un transducteur

Also Published As

Publication number Publication date
AT316669B (de) 1974-07-25
DE1948932A1 (de) 1970-04-09
NL6813996A (enrdf_load_stackoverflow) 1970-04-01
US3654402A (en) 1972-04-04
GB1245030A (en) 1971-09-02

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Legal Events

Date Code Title Description
ST Notification of lapse