FR2377736A1 - Microphone de combine telephonique - Google Patents

Microphone de combine telephonique

Info

Publication number
FR2377736A1
FR2377736A1 FR7801129A FR7801129A FR2377736A1 FR 2377736 A1 FR2377736 A1 FR 2377736A1 FR 7801129 A FR7801129 A FR 7801129A FR 7801129 A FR7801129 A FR 7801129A FR 2377736 A1 FR2377736 A1 FR 2377736A1
Authority
FR
France
Prior art keywords
microphone
handset microphone
opening
phone handset
acoustic
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Withdrawn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
FR7801129A
Other languages
English (en)
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of FR2377736A1 publication Critical patent/FR2377736A1/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Withdrawn legal-status Critical Current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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Abstract

La présente invention concerne un microphone de combiné téléphonique. A partir d'un microphone classique, on améliore la courbe de réponse en prévoyant un trajet de résistance acoustique 31, 32, vers et à partir-du volume d'air confiné formé entre le cadre 11 et le diaphragme de ce microphone, la résistance acoustique étant plus faible que la valeur classique, par exemple inférieure à 40 ohms au maximum et proche de 0 au minimum. Plus d'une ouverture peuvent être prévues et un tube peut entourer une ouverture pour assurer une certaine inertance relativement à la circulation de l'air. Application à l'amélioration des conversations téléphoniques.
FR7801129A 1977-01-18 1978-01-16 Microphone de combine telephonique Withdrawn FR2377736A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA269,918A CA1069233A (fr) 1977-01-18 1977-01-18 Emetteur-combine telephonique a reponse amelioree
US05/761,275 US4086445A (en) 1977-01-18 1977-01-21 Telephone handset transmitter with improved output response

Publications (1)

Publication Number Publication Date
FR2377736A1 true FR2377736A1 (fr) 1978-08-11

Family

ID=25668432

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7801129A Withdrawn FR2377736A1 (fr) 1977-01-18 1978-01-16 Microphone de combine telephonique

Country Status (6)

Country Link
US (1) US4086445A (fr)
CA (1) CA1069233A (fr)
DE (1) DE2801654A1 (fr)
FR (1) FR2377736A1 (fr)
GB (1) GB1599554A (fr)
SE (1) SE7800605L (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ199275A (en) * 1980-12-16 1984-11-09 Minnesota Mining Mfg Australia Verification of recorded messages
FR2822617B1 (fr) * 2001-03-20 2003-08-01 Cit Alcatel Telephone mains libres tolerant aux fuites
US8094861B2 (en) * 2008-06-18 2012-01-10 Nien-Tzu Liu Speaker
US9628903B2 (en) 2014-12-23 2017-04-18 Bose Corporation Microspeaker acoustical resistance assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540498A (en) * 1949-03-18 1951-02-06 Bell Telephone Labor Inc Microphone damping system having rear openings
AT227805B (de) * 1961-10-03 1963-06-10 Schallwandler für Diktiergeräte
BE631608A (fr) * 1962-04-27
DE2052444A1 (de) * 1970-10-26 1971-11-04 Sennheiser Electronic Dynamisches Lavaliermikrofon
DE2246981B2 (de) * 1972-09-25 1974-07-18 Siemens Ag, 1000 Berlin U. 8000 Muenchen Anordnung zur Frequenzgangbeeinflussung elektroakustischer Wandler

Also Published As

Publication number Publication date
DE2801654A1 (de) 1978-07-20
US4086445A (en) 1978-04-25
SE7800605L (sv) 1978-07-19
GB1599554A (en) 1981-10-07
CA1069233A (fr) 1980-01-01

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Legal Events

Date Code Title Description
ST Notification of lapse