GB950675A - An electro-acoustic transducer - Google Patents

An electro-acoustic transducer

Info

Publication number
GB950675A
GB950675A GB2623061A GB2623061A GB950675A GB 950675 A GB950675 A GB 950675A GB 2623061 A GB2623061 A GB 2623061A GB 2623061 A GB2623061 A GB 2623061A GB 950675 A GB950675 A GB 950675A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
apertures
resonator
acoustic
pipes
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.)
Expired
Application number
GB2623061A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB950675A publication Critical patent/GB950675A/en
Expired 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • 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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Abstract

950,675. Transducers. SIEMENS & HALSKE A.G. July 19, 1961 [July 22, 1960], No. 26230/61. Heading H4J. An electro-acoustic transducer having a diaphragm is provided with a resonator in the form of an acoustic pipe disposed in front of the diaphragm, the pipe having an arcuate axis lying in a plane parallel to the diaphragm. As shown, the invention is applied to a moving- coil transducer having a moving coil 6, operating in a ring-shaped gap 5, mechanically connected to a diaphragm 7. The protective cap 8 has acoustically inactive apertures 9. An absorption resonator 10 is provided behind the diaphragm 7, the partition 11 being thin-walled and having two tubular resonator apertures 12, 13, of negligible acoustic frictional resistance, closed by foils 14, 15 of acoustic damping material. Apertures 16 in the pole plate 4 allow the resonator 10 to be directly coupled to the space behind the diaphragm 7 by the apertures 12, 13, and thus to suppress an undesired resonance point of the transducer. A tube 19 in the freely moving part of the diaphragm 7 couples the space in front of the diaphragm to that behind it, and is so dimensioned as to resonate at the lower frequency end of the frequency range, thus extending the said range. The provision of the two resonant pipes 21, 22 in front of the diaphragm serve to suppress resonant points at the higher frequency end of the range, the lengths of these pipes being chosen so as to be equal to half the wavelengths of the undesired resonant frequencies. In a modification, the pipes are disposed on the front surface of the diaphragm.
GB2623061A 1960-07-22 1961-07-19 An electro-acoustic transducer Expired GB950675A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES69544A DE1167897B (en) 1960-07-22 1960-07-22 Arrangement for frequency response improvement for electroacoustic converters

Publications (1)

Publication Number Publication Date
GB950675A true GB950675A (en) 1964-02-26

Family

ID=7501053

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2623061A Expired GB950675A (en) 1960-07-22 1961-07-19 An electro-acoustic transducer

Country Status (6)

Country Link
BE (1) BE606388A (en)
CH (1) CH395192A (en)
DE (1) DE1167897B (en)
GB (1) GB950675A (en)
NL (1) NL267294A (en)
SE (1) SE309609B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4860368A (en) * 1986-09-11 1989-08-22 Siemens Aktiengesellschaft Acoustic transducers with improved frequency response

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4843628A (en) * 1986-07-10 1989-06-27 Stanton Magnetics, Inc. Inertial microphone/receiver with extended frequency response
CN1015289B (en) * 1988-08-10 1992-01-01 西门子公司 Electroacoustic transducer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE554098C (en) * 1927-10-04 1932-07-04 Gramophone Co Ltd Resonator for sound reproduction devices
NL78163C (en) * 1950-05-11
DE1677711U (en) * 1953-03-24 1954-06-10 Siemens Ag CARBON MICROPHONE WITH RESONATOR VOICE.
DE1076182B (en) * 1957-02-21 1960-02-25 F & H Schumann G M B H Filter arrangement for electro-acoustic converters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4860368A (en) * 1986-09-11 1989-08-22 Siemens Aktiengesellschaft Acoustic transducers with improved frequency response

Also Published As

Publication number Publication date
DE1167897B (en) 1964-04-16
NL267294A (en)
CH395192A (en) 1965-07-15
BE606388A (en) 1961-11-16
SE309609B (en) 1969-03-31

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