CA2009293C - Handset transmitter for communication equipment - Google Patents

Handset transmitter for communication equipment

Info

Publication number
CA2009293C
CA2009293C CA002009293A CA2009293A CA2009293C CA 2009293 C CA2009293 C CA 2009293C CA 002009293 A CA002009293 A CA 002009293A CA 2009293 A CA2009293 A CA 2009293A CA 2009293 C CA2009293 C CA 2009293C
Authority
CA
Canada
Prior art keywords
microphone
air chamber
chamber housing
transmitter
handset
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 - Lifetime
Application number
CA002009293A
Other languages
English (en)
French (fr)
Other versions
CA2009293A1 (en
Inventor
Hidenori Oku
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Publication of CA2009293A1 publication Critical patent/CA2009293A1/en
Application granted granted Critical
Publication of CA2009293C publication Critical patent/CA2009293C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H04M1/035—Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
CA002009293A 1989-02-06 1990-02-05 Handset transmitter for communication equipment Expired - Lifetime CA2009293C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12815/1989 1989-02-06
JP1989012815U JPH0727715Y2 (ja) 1989-02-06 1989-02-06 ハンドセット

Publications (2)

Publication Number Publication Date
CA2009293A1 CA2009293A1 (en) 1990-08-06
CA2009293C true CA2009293C (en) 1994-07-26

Family

ID=11815884

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002009293A Expired - Lifetime CA2009293C (en) 1989-02-06 1990-02-05 Handset transmitter for communication equipment

Country Status (5)

Country Link
US (1) US5144656A (en])
JP (1) JPH0727715Y2 (en])
KR (1) KR930001820B1 (en])
CA (1) CA2009293C (en])
GB (1) GB2228646B (en])

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9317982U1 (de) * 1993-11-24 1994-03-10 Siemens AG, 80333 München Handapparat für eine Fernsprechstation
JP2609822B2 (ja) * 1994-10-12 1997-05-14 埼玉日本電気株式会社 送話器
US7106876B2 (en) * 2002-10-15 2006-09-12 Shure Incorporated Microphone for simultaneous noise sensing and speech pickup
KR100831119B1 (ko) * 2002-12-24 2008-05-20 엘지노텔 주식회사 통신용 단말기의 노이즈 감쇠 핸드셋
US20080170724A1 (en) * 2007-01-16 2008-07-17 Byron Demetrious Cancelmo Vocal monitor
DE102007021276A1 (de) * 2007-05-07 2008-11-13 Siemens Medical Instruments Pte. Ltd. Hörhilfegerät mit einer Abschirmung
US9686389B2 (en) 2015-11-02 2017-06-20 Cisco Technology, Inc. Audio transducer and associated holding device for enhanced acoustic and electromagnetic coupling
US11785375B2 (en) 2021-06-15 2023-10-10 Quiet, Inc. Precisely controlled microphone acoustic attenuator with protective microphone enclosure

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3240883A (en) * 1961-05-25 1966-03-15 Shure Bros Microphone
ZA728218B (en) * 1971-11-23 1973-07-25 Plessey Ducon Ltd Microphone damping
CH528197A (de) * 1971-12-20 1972-09-15 Ibm Gehäuseanordnung mit einem elektro-akustischen Wandler, und Verwendung derselben in einem Telefonapparat einer Nachrichtenübertragungsanlage mit PCM-Codierung
JPS6017191B2 (ja) * 1977-12-30 1985-05-01 アイホン株式会社 風雑音減衰効果を有するマイクロンホンユニツト
DE2831401C2 (de) * 1978-07-17 1987-03-19 Siemens AG, 1000 Berlin und 8000 München Elektroakustischer Wandler
DE2831411C2 (de) * 1978-07-17 1983-10-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektroakustischer Wandler mit mit piezoelektrischer Schicht versehener Membran
GB2064265B (en) * 1979-11-30 1984-01-11 Pye Electronic Prod Ltd Microphone unit
JPS62141246U (en]) * 1986-02-28 1987-09-05
US4776009A (en) * 1986-06-09 1988-10-04 Northern Telecom Limited Telephone handset having housings assembled without mechanical fasteners
DE3634620A1 (de) * 1986-10-10 1988-04-14 Siemens Ag Anordnung zum schutz vor spannungsueberschlaegen bei handapparaten der fernsprechtechnik

Also Published As

Publication number Publication date
GB9002482D0 (en) 1990-04-04
CA2009293A1 (en) 1990-08-06
KR930001820B1 (ko) 1993-03-13
GB2228646B (en) 1993-09-08
JPH02103950U (en]) 1990-08-17
US5144656A (en) 1992-09-01
GB2228646A (en) 1990-08-29
JPH0727715Y2 (ja) 1995-06-21
KR900013747A (ko) 1990-09-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202