JPS54124904A - Method of eliminating howling of speaker type simultaneous talking interphone and speaker type simultaneous talking interphone - Google Patents

Method of eliminating howling of speaker type simultaneous talking interphone and speaker type simultaneous talking interphone

Info

Publication number
JPS54124904A
JPS54124904A JP3334278A JP3334278A JPS54124904A JP S54124904 A JPS54124904 A JP S54124904A JP 3334278 A JP3334278 A JP 3334278A JP 3334278 A JP3334278 A JP 3334278A JP S54124904 A JPS54124904 A JP S54124904A
Authority
JP
Japan
Prior art keywords
interphone
type simultaneous
speaker type
simultaneous talking
talking
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.)
Pending
Application number
JP3334278A
Other languages
Japanese (ja)
Inventor
Masaharu Suzuki
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.)
Aiphone Co Ltd
Original Assignee
Aiphone Co 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 Aiphone Co Ltd filed Critical Aiphone Co Ltd
Priority to JP3334278A priority Critical patent/JPS54124904A/en
Publication of JPS54124904A publication Critical patent/JPS54124904A/en
Pending legal-status Critical Current

Links

Landscapes

  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
JP3334278A 1978-03-22 1978-03-22 Method of eliminating howling of speaker type simultaneous talking interphone and speaker type simultaneous talking interphone Pending JPS54124904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3334278A JPS54124904A (en) 1978-03-22 1978-03-22 Method of eliminating howling of speaker type simultaneous talking interphone and speaker type simultaneous talking interphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3334278A JPS54124904A (en) 1978-03-22 1978-03-22 Method of eliminating howling of speaker type simultaneous talking interphone and speaker type simultaneous talking interphone

Publications (1)

Publication Number Publication Date
JPS54124904A true JPS54124904A (en) 1979-09-28

Family

ID=12383882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3334278A Pending JPS54124904A (en) 1978-03-22 1978-03-22 Method of eliminating howling of speaker type simultaneous talking interphone and speaker type simultaneous talking interphone

Country Status (1)

Country Link
JP (1) JPS54124904A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63152344U (en) * 1987-03-25 1988-10-06
JPH01319360A (en) * 1988-06-20 1989-12-25 Nec Corp Voice conference equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63152344U (en) * 1987-03-25 1988-10-06
JPH01319360A (en) * 1988-06-20 1989-12-25 Nec Corp Voice conference equipment

Similar Documents

Publication Publication Date Title
GB2023375B (en) Loudspeakers and methods of making loudspeakers
GB2037122B (en) Speaker diaphragm and method of preparation of the same
DE3268093D1 (en) Improvement to public telephony method and apparatus employing selector-equipped normal and trunk call sets
GB2100551B (en) End-fire microphone and loudspeaker structures
JPS51112202A (en) Gasket and method of fabricating same
JPS51135308A (en) System for switching telephone set and method of switching same
GB2029161B (en) Electret microphone
DE2861459D1 (en) Electret transducer and method of making an electret transducer
GB2015299B (en) Electret microphone
AU532302B2 (en) Apparatus for establishing multi-address and conference call connections
DE2966743D1 (en) Acoustic speaker
JPS54124904A (en) Method of eliminating howling of speaker type simultaneous talking interphone and speaker type simultaneous talking interphone
JPS5597769A (en) Method of and device for talking via plural different telephone sets
JPS5566199A (en) Electret microphone
JPS57122512A (en) Electret and method of producing same
JPS54114232A (en) Vibrating plate for speaker and method of fabricating same
AU500321B2 (en) Telephone microphone
JPS54157619A (en) Speaker vibrating plate and method of fabricating same
JPS54114233A (en) Vibrating plate for speaker and method of fabricating same
JPS54155820A (en) Talking microphone
JPS54123816A (en) Method of controlling telephone set
GB2015849B (en) Audio teleconferencing
JPS54155824A (en) Speaker vibrating plate and method of fabricating same
JPS54119916A (en) Speaker vibrator and method of producing same
JPS54145520A (en) Speaker voice coil