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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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)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Noise Elimination (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (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 (https=)
EP (1) EP0995188B1 (https=)
JP (1) JP4082649B2 (https=)
KR (1) KR100480404B1 (https=)
CN (1) CN1122963C (https=)
AU (1) AU747618B2 (https=)
BR (1) BR9810695A (https=)
DE (1) DE69837663D1 (https=)
EE (1) EE200000008A (https=)
MY (1) MY120049A (https=)
PL (1) PL337971A1 (https=)
SG (1) SG70644A1 (https=)
TW (1) TW386330B (https=)
WO (1) WO1999003091A1 (https=)

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Also Published As

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

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