AT389202B - THRESHOLD SWITCHING FOR A MICROPHONE SYSTEM - Google Patents

THRESHOLD SWITCHING FOR A MICROPHONE SYSTEM

Info

Publication number
AT389202B
AT389202B AT0172888A AT172888A AT389202B AT 389202 B AT389202 B AT 389202B AT 0172888 A AT0172888 A AT 0172888A AT 172888 A AT172888 A AT 172888A AT 389202 B AT389202 B AT 389202B
Authority
AT
Austria
Prior art keywords
microphone system
threshold switching
threshold
switching
microphone
Prior art date
Application number
AT0172888A
Other languages
German (de)
Other versions
ATA172888A (en
Inventor
Stephen D Julstrom
Original Assignee
Shure Bros
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 Bros filed Critical Shure Bros
Publication of ATA172888A publication Critical patent/ATA172888A/en
Application granted granted Critical
Publication of AT389202B publication Critical patent/AT389202B/en

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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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)
AT0172888A 1985-04-19 1988-07-04 THRESHOLD SWITCHING FOR A MICROPHONE SYSTEM AT389202B (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
ATA172888A ATA172888A (en) 1989-03-15
AT389202B true AT389202B (en) 1989-11-10

Family

ID=24913986

Family Applications (2)

Application Number Title Priority Date Filing Date
AT0103086A AT388480B (en) 1985-04-19 1986-04-18 MICROPHONE SYSTEM WITH SEVERAL MICROPHONES
AT0172888A AT389202B (en) 1985-04-19 1988-07-04 THRESHOLD SWITCHING FOR A MICROPHONE SYSTEM

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT0103086A AT388480B (en) 1985-04-19 1986-04-18 MICROPHONE SYSTEM WITH SEVERAL MICROPHONES

Country Status (7)

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

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 (en) * 1987-10-12 1989-05-18 Telefonbau & Normalzeit Gmbh Conference speakerphone
DE69224680T2 (en) * 1991-05-29 1998-09-17 Koninkl Philips Electronics Nv Electroacoustic amplifier arrangement and microphone arrangement for use in the electroacoustic amplifier arrangement
KR100233166B1 (en) * 1997-07-04 1999-12-01 윤종용 Handfree device having multi-mike and control method
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 (en) * 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 (en) * 1977-05-09 1978-12-08 France Etat AUDIOCONFERENCE SYSTEM BY TELEPHONE LINK
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 (en) * 1982-10-02 1984-05-04 Fujitsu Ltd Microphone amplifier circuit

Also Published As

Publication number Publication date
CA1256036A (en) 1989-06-20
NL193041C (en) 1998-08-04
GB8606874D0 (en) 1986-04-23
FR2580882A1 (en) 1986-10-24
FR2580882B1 (en) 1993-12-10
NL193041B (en) 1998-04-01
ATA103086A (en) 1988-11-15
AT388480B (en) 1989-06-26
DE3612708A1 (en) 1986-10-23
ATA172888A (en) 1989-03-15
JPS61242499A (en) 1986-10-28
GB2174268B (en) 1989-12-06
CA1263608C (en) 1989-12-05
NL8600996A (en) 1986-11-17
GB2174268A (en) 1986-10-29

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Legal Events

Date Code Title Description
EFA Change in the company name
EIH Change in the person of patent owner
ELA Expired due to lapse of time