AU747618B2 - Methods and apparatus for measuring signal level and delay at multiple sensors - Google Patents

Methods and apparatus for measuring signal level and delay at multiple sensors Download PDF

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Publication number
AU747618B2
AU747618B2 AU83642/98A AU8364298A AU747618B2 AU 747618 B2 AU747618 B2 AU 747618B2 AU 83642/98 A AU83642/98 A AU 83642/98A AU 8364298 A AU8364298 A AU 8364298A AU 747618 B2 AU747618 B2 AU 747618B2
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AU
Australia
Prior art keywords
filter
signal
processing device
signal processing
filtering characteristic
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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.)
Ceased
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AU83642/98A
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English (en)
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AU8364298A (en
Inventor
Knut Peter Handel
Jim Agne Jerker Rasmusson
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU8364298A publication Critical patent/AU8364298A/en
Application granted granted Critical
Publication of AU747618B2 publication Critical patent/AU747618B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • G10K11/345—Circuits therefor using energy switching from one active element to another
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Noise Elimination (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
AU83642/98A 1997-07-11 1998-07-03 Methods and apparatus for measuring signal level and delay at multiple sensors Ceased AU747618B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/890,768 US6430295B1 (en) 1997-07-11 1997-07-11 Methods and apparatus for measuring signal level and delay at multiple sensors
US08/890768 1997-07-11
PCT/SE1998/001319 WO1999003091A1 (en) 1997-07-11 1998-07-03 Methods and apparatus for measuring signal level and delay at multiple sensors

Publications (2)

Publication Number Publication Date
AU8364298A AU8364298A (en) 1999-02-08
AU747618B2 true AU747618B2 (en) 2002-05-16

Family

ID=25397124

Family Applications (1)

Application Number Title Priority Date Filing Date
AU83642/98A Ceased AU747618B2 (en) 1997-07-11 1998-07-03 Methods and apparatus for measuring signal level and delay at multiple sensors

Country Status (14)

Country Link
US (1) US6430295B1 (enExample)
EP (1) EP0995188B1 (enExample)
JP (1) JP4082649B2 (enExample)
KR (1) KR100480404B1 (enExample)
CN (1) CN1122963C (enExample)
AU (1) AU747618B2 (enExample)
BR (1) BR9810695A (enExample)
DE (1) DE69837663D1 (enExample)
EE (1) EE200000008A (enExample)
MY (1) MY120049A (enExample)
PL (1) PL337971A1 (enExample)
SG (1) SG70644A1 (enExample)
TW (1) TW386330B (enExample)
WO (1) WO1999003091A1 (enExample)

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Also Published As

Publication number Publication date
WO1999003091A1 (en) 1999-01-21
CN1269902A (zh) 2000-10-11
CN1122963C (zh) 2003-10-01
SG70644A1 (en) 2000-02-22
US6430295B1 (en) 2002-08-06
KR100480404B1 (ko) 2005-04-06
HK1031421A1 (en) 2001-06-15
EP0995188A1 (en) 2000-04-26
TW386330B (en) 2000-04-01
JP2001509659A (ja) 2001-07-24
PL337971A1 (en) 2000-09-11
KR20010021720A (ko) 2001-03-15
JP4082649B2 (ja) 2008-04-30
AU8364298A (en) 1999-02-08
EP0995188B1 (en) 2007-04-25
DE69837663D1 (de) 2007-06-06
MY120049A (en) 2005-08-30
EE200000008A (et) 2000-08-15
BR9810695A (pt) 2000-09-05

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