DK55033C - Ørestykke til Telefoner eller Talestykke til Mikrofoner. - Google Patents

Ørestykke til Telefoner eller Talestykke til Mikrofoner.

Info

Publication number: DK55033C
Authority: DK; Denmark
Prior art keywords: voicepiece; earpiece; microphones; phones
Prior art date: 1936-10-05

Application number

Other languages

English (en)

Inventor

Niels Poul Robert Jarnak

Original Assignee

Niels Poul Robert Jarnak

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.)

1936-10-05

Filing date

1936-10-05

Publication date

1938-08-01

1936-10-05 Application filed by Niels Poul Robert Jarnak filed Critical Niels Poul Robert Jarnak

1938-08-01 Application granted granted Critical

1938-08-01 Publication of DK55033C publication Critical patent/DK55033C/da

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

Landscapes

Health & Medical Sciences (AREA)
Otolaryngology (AREA)
Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

DK55033D 1936-10-05 1936-10-05 Ørestykke til Telefoner eller Talestykke til Mikrofoner. DK55033C (da)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DK55033T		1936-10-05
FR841086T		1938-07-25

Publications (1)

Publication Number	Publication Date
DK55033C true DK55033C (da)	1938-08-01

Family

ID=8142986

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK55033D DK55033C (da)	1936-10-05	1936-10-05	Ørestykke til Telefoner eller Talestykke til Mikrofoner.

Country Status (5)

Country	Link
US (1)	US2153044A (da)
CH (1)	CH200196A (da)
DK (1)	DK55033C (da)
FR (1)	FR841086A (da)
GB (1)	GB487566A (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE847921C (de) *	1950-10-29	1952-08-28	Lab Wennebostel Dr Ing Sennhei	Lautsprecher mit Rohrleitung
DE940167C (de) *	1953-07-01	1956-03-15	Carl Schmidbauer	Einsprachevorrichtung fuer ein raumschallunempfindliches und akustisch rueckkopplungsfreies Mikrofon
US3084229A (en) *	1960-03-11	1963-04-02	Ampex	Electrostatic earphone
US4189627A (en) *	1978-11-27	1980-02-19	Bell Telephone Laboratories, Incorporated	Electroacoustic transducer filter assembly

1936
- 1936-10-05 DK DK55033D patent/DK55033C/da active
1937
- 1937-10-02 CH CH200196D patent/CH200196A/de unknown
- 1937-10-05 US US167335A patent/US2153044A/en not_active Expired - Lifetime
- 1937-10-05 GB GB27356/37A patent/GB487566A/en not_active Expired
1938
- 1938-07-25 FR FR841086D patent/FR841086A/fr not_active Expired

Also Published As

Publication number	Publication date
CH200196A (de)	1938-09-30
US2153044A (en)	1939-04-04
GB487566A (en)	1938-06-22
FR841086A (fr)	1939-05-10

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