CA1256036A - MICROPHONE CONTROL SYSTEM FOR TELECONFERENCES - Google Patents

MICROPHONE CONTROL SYSTEM FOR TELECONFERENCES

Info

Publication number
CA1256036A
CA1256036A CA000504842A CA504842A CA1256036A CA 1256036 A CA1256036 A CA 1256036A CA 000504842 A CA000504842 A CA 000504842A CA 504842 A CA504842 A CA 504842A CA 1256036 A CA1256036 A CA 1256036A
Authority
CA
Canada
Prior art keywords
microphone
signal
microphones
loudspeaker
control system
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
CA000504842A
Other languages
English (en)
French (fr)
Other versions
CA1263608C (nl
Inventor
Stephen D Julstrom
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.)
Shure Inc
Original Assignee
Shure Brothers Inc
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 Shure Brothers Inc filed Critical Shure Brothers Inc
Priority to CA000593877A priority Critical patent/CA1263608A/en
Publication of CA1256036A publication Critical patent/CA1256036A/en
Application granted granted Critical
Publication of CA1263608C publication Critical patent/CA1263608C/xx
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
    • H04M3/569—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants using the instant speaker's algorithm
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/326—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/401—2D or 3D arrays of transducers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Circuit For Audible Band Transducer (AREA)
CA000504842A 1985-04-19 1986-03-24 MICROPHONE CONTROL SYSTEM FOR TELECONFERENCES Expired CA1256036A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000593877A CA1263608A (en) 1985-04-19 1989-03-15 Microphone actuation control system suitable for teleconference systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72530285A 1985-04-19 1985-04-19

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA000593877A Division CA1263608A (en) 1985-04-19 1989-03-15 Microphone actuation control system suitable for teleconference systems

Publications (2)

Publication Number Publication Date
CA1256036A true CA1256036A (en) 1989-06-20
CA1263608C CA1263608C (nl) 1989-12-05

Family

ID=24913986

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000504842A Expired CA1256036A (en) 1985-04-19 1986-03-24 MICROPHONE CONTROL SYSTEM FOR TELECONFERENCES

Country Status (7)

Country Link
JP (1) JPS61242499A (nl)
AT (2) AT388480B (nl)
CA (1) CA1256036A (nl)
DE (1) DE3612708A1 (nl)
FR (1) FR2580882B1 (nl)
GB (1) GB2174268B (nl)
NL (1) NL193041C (nl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0271948A3 (en) * 1986-12-16 1989-05-03 Alcatel N.V. Telecommunication circuit
DE3734447C1 (de) * 1987-10-12 1989-05-18 Telefonbau & Normalzeit Gmbh Konferenz-Freisprecheinrichtung
DE69224680T2 (de) * 1991-05-29 1998-09-17 Koninkl Philips Electronics Nv Elektroakustische Verstärker-Anordnung und Mikrofonanordnung zur Verwendung in der elektroakustischen Verstärker-Anordnung
KR100233166B1 (ko) * 1997-07-04 1999-12-01 윤종용 다수의 마이크들을 구비하는 핸드 프리 장치 및 그 제어 방법
US11039260B2 (en) 2019-09-19 2021-06-15 Jerry Mirsky Communication system for controlling the sequence and duration of speeches at public debates

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751602A (en) * 1971-08-13 1973-08-07 Bell Telephone Labor Inc Loudspeaking telephone
JPS4933601A (nl) * 1972-07-24 1974-03-28
US4008376A (en) * 1975-10-17 1977-02-15 Bell Telephone Laboratories, Incorporated Loudspeaking teleconferencing circuit
US4090032A (en) * 1976-05-05 1978-05-16 Wm. A. Holmin Corporation Control system for audio amplifying system having multiple microphones
CA1050154A (en) * 1977-01-14 1979-03-06 Conrad D. Lafrance Telephone conferencing apparatus
FR2390864A1 (fr) * 1977-05-09 1978-12-08 France Etat Systeme d'audioconference par liaison telephonique
US4359602A (en) * 1979-01-17 1982-11-16 Ponto Robert A Multiple input audio program system
US4449238A (en) * 1982-03-25 1984-05-15 Bell Telephone Laboratories, Incorporated Voice-actuated switching system
JPS5977710A (ja) * 1982-10-02 1984-05-04 Fujitsu Ltd マイクロホン増巾回路

Also Published As

Publication number Publication date
AT388480B (de) 1989-06-26
GB8606874D0 (en) 1986-04-23
AT389202B (de) 1989-11-10
NL8600996A (nl) 1986-11-17
NL193041B (nl) 1998-04-01
ATA172888A (de) 1989-03-15
DE3612708A1 (de) 1986-10-23
NL193041C (nl) 1998-08-04
FR2580882B1 (fr) 1993-12-10
CA1263608C (nl) 1989-12-05
FR2580882A1 (fr) 1986-10-24
GB2174268A (en) 1986-10-29
ATA103086A (de) 1988-11-15
GB2174268B (en) 1989-12-06
JPS61242499A (ja) 1986-10-28

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Legal Events

Date Code Title Description
MKEX Expiry