FR2420266A1 - GROUNDS FREE MICROPHONE - Google Patents

GROUNDS FREE MICROPHONE

Info

Publication number
FR2420266A1
FR2420266A1 FR7906282A FR7906282A FR2420266A1 FR 2420266 A1 FR2420266 A1 FR 2420266A1 FR 7906282 A FR7906282 A FR 7906282A FR 7906282 A FR7906282 A FR 7906282A FR 2420266 A1 FR2420266 A1 FR 2420266A1
Authority
FR
France
Prior art keywords
microphone
elements
volume
grounds
respect
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.)
Withdrawn
Application number
FR7906282A
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 FR2420266A1 publication Critical patent/FR2420266A1/en
Withdrawn legal-status Critical Current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
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones

Abstract

Microphone exempt de grondement et comportant deux éléments ayant pratiquement la même forme et placés de façon qu'un élément constitue pratiquement l'image réfléchie de l'autre élément, alors que la membrane de chaque élément de microphone est liée à au moins un volume d'air et que le(s) volume(s) d'air lié(s) à un élément de microphone est (sont) séparé(s) acoustiquement du (des) volume(s) d'air lié(s) à l'autre élément de microphone par une cloison de sorte que les deux éléments de microphone étant interconnectés électriquement de façon adéquate, ceux-ci sont commandés dans la même phase à l'égard de vibrations sonores désirées et en opposition de phase à l'égard de vibrations mécaniques indésirables. Les éléments sont des éléments de microphone à condensateur, et un circuit électrique est aménagé dans ladite cloison Application : appareils d'enregistrement par voie magnétique.Microphone free from rumble and having two elements having substantially the same shape and placed so that one element constitutes substantially the reflected image of the other element, while the membrane of each microphone element is linked to at least a volume of air and that the volume (s) of air bound (s) to a microphone element is (are) acoustically separated from the volume (s) of air bound (s) to the The other microphone element by a bulkhead so that the two microphone elements being adequately electrically interconnected these are driven in the same phase with respect to desired sound vibrations and out of phase with respect to unwanted mechanical vibrations. The elements are condenser microphone elements, and an electrical circuit is provided in said partition. Application: magnetic recording apparatus.

FR7906282A 1978-03-13 1979-03-12 GROUNDS FREE MICROPHONE Withdrawn FR2420266A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7802687A NL7802687A (en) 1978-03-13 1978-03-13 BUNCH-FREE MICROPHONE COMBINATION CONTAINS TWO MICROPHONE ELEMENTS.

Publications (1)

Publication Number Publication Date
FR2420266A1 true FR2420266A1 (en) 1979-10-12

Family

ID=19830478

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906282A Withdrawn FR2420266A1 (en) 1978-03-13 1979-03-12 GROUNDS FREE MICROPHONE

Country Status (9)

Country Link
JP (1) JPS54126526A (en)
AT (1) ATA183379A (en)
AU (1) AU4507579A (en)
DE (1) DE2909065A1 (en)
DK (1) DK98479A (en)
FR (1) FR2420266A1 (en)
GB (1) GB2016861A (en)
IT (1) IT1110405B (en)
NL (1) NL7802687A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321432A (en) * 1978-12-23 1982-03-23 Tokyo Shibaura Denki Kabushiki Kaisha Electrostatic microphone
US4443666A (en) * 1980-11-24 1984-04-17 Gentex Corporation Electret microphone assembly
DE3429147A1 (en) * 1984-08-08 1986-02-20 Friedrich 6650 Homburg Müller ARRANGEMENT FOR ACOUSTIC COUPLING OF SPEAKERS
GB2176369B (en) * 1985-05-09 1988-10-05 Plessey Co Plc Improvements in and relating to microphones
JPH01142295U (en) * 1988-03-19 1989-09-29
DE19843731C2 (en) * 1998-09-24 2001-10-25 Sennheiser Electronic Sound conversion device

Also Published As

Publication number Publication date
IT7920890A0 (en) 1979-03-09
DE2909065A1 (en) 1979-09-20
ATA183379A (en) 1980-04-15
DK98479A (en) 1979-09-14
IT1110405B (en) 1985-12-23
GB2016861A (en) 1979-09-26
AU4507579A (en) 1979-09-20
JPS54126526A (en) 1979-10-01
NL7802687A (en) 1979-09-17

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Legal Events

Date Code Title Description
ST Notification of lapse