JPS6442966A - Telephone set - Google Patents

Telephone set

Info

Publication number
JPS6442966A
JPS6442966A JP19952487A JP19952487A JPS6442966A JP S6442966 A JPS6442966 A JP S6442966A JP 19952487 A JP19952487 A JP 19952487A JP 19952487 A JP19952487 A JP 19952487A JP S6442966 A JPS6442966 A JP S6442966A
Authority
JP
Japan
Prior art keywords
microphone
surrounding noise
output
unidirectional
moving piece
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
JP19952487A
Other languages
Japanese (ja)
Inventor
Kazunari Hirano
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP19952487A priority Critical patent/JPS6442966A/en
Publication of JPS6442966A publication Critical patent/JPS6442966A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To collect a transmission tone easily by leading out a 2nd microphone to cancel surrounding noise only when the surrounding noise is large to cancel the surrounding noise inputted from a mouthpiece and approaching the mouthpiece toward the mouth of a talker. CONSTITUTION:A nondirectivity microphone 6 for transmission and a unidirectional microphone 7 directed in a direction deviated from a direction of the location of a receiver 3 close to the nondirective microphone 6 are fitted to a moving piece 5 and the moving piece 5 is provided so that a sound collection hole of the unidirectional microphone 7 appears or disappears from/to the handset 1 movably to the handset 1. A switch 10 turning on the unidirectional microphone 7 is provided while the moving piece is projected and a subtraction means using an output being the subtraction of the output of the unidirectional microphone 7 from the output of the nondirectional microphone 6 as the transmission output is provided in setting the unidirectional microphone 7. Thus, in using the telephone set with large surrounding noise, the surrounding noise is cancelled to prevent the deterioration in the talking quality.
JP19952487A 1987-08-10 1987-08-10 Telephone set Pending JPS6442966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19952487A JPS6442966A (en) 1987-08-10 1987-08-10 Telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19952487A JPS6442966A (en) 1987-08-10 1987-08-10 Telephone set

Publications (1)

Publication Number Publication Date
JPS6442966A true JPS6442966A (en) 1989-02-15

Family

ID=16409261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19952487A Pending JPS6442966A (en) 1987-08-10 1987-08-10 Telephone set

Country Status (1)

Country Link
JP (1) JPS6442966A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06224987A (en) * 1992-10-29 1994-08-12 Andrea Electron Corp Noise canceler
JPH0865367A (en) * 1994-08-16 1996-03-08 Nec Corp Portable communication equipment
US5625684A (en) * 1993-02-04 1997-04-29 Local Silence, Inc. Active noise suppression system for telephone handsets and method
US5664014A (en) * 1992-10-20 1997-09-02 Pan Communications, Inc. Two-way communications earset
WO2002051104A1 (en) * 2000-12-21 2002-06-27 Thales Defence Limited Audio handheld device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5664014A (en) * 1992-10-20 1997-09-02 Pan Communications, Inc. Two-way communications earset
JPH06224987A (en) * 1992-10-29 1994-08-12 Andrea Electron Corp Noise canceler
US5625684A (en) * 1993-02-04 1997-04-29 Local Silence, Inc. Active noise suppression system for telephone handsets and method
JPH0865367A (en) * 1994-08-16 1996-03-08 Nec Corp Portable communication equipment
WO2002051104A1 (en) * 2000-12-21 2002-06-27 Thales Defence Limited Audio handheld device

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