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GB2234882B - Noise reduction system - Google Patents

Noise reduction system

Info

Publication number
GB2234882B
GB2234882B GB8917742A GB8917742A GB2234882B GB 2234882 B GB2234882 B GB 2234882B GB 8917742 A GB8917742 A GB 8917742A GB 8917742 A GB8917742 A GB 8917742A GB 2234882 B GB2234882 B GB 2234882B
Authority
GB
United Kingdom
Prior art keywords
noise reduction
reduction system
noise
reduction
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 - Fee Related
Application number
GB8917742A
Other versions
GB2234882A (en
GB8917742D0 (en
Inventor
Anthony John Salloway
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.)
GE Healthcare UK Ltd
Plessey Co Ltd
BAE Systems Electronics Ltd
Original Assignee
GEC Marconi Ltd
GE Healthcare UK Ltd
Plessey Co Ltd
Marconi Co Ltd
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 GEC Marconi Ltd, GE Healthcare UK Ltd, Plessey Co Ltd, Marconi Co Ltd filed Critical GEC Marconi Ltd
Priority to GB8917742A priority Critical patent/GB2234882B/en
Publication of GB8917742D0 publication Critical patent/GB8917742D0/en
Publication of GB2234882A publication Critical patent/GB2234882A/en
Application granted granted Critical
Publication of GB2234882B publication Critical patent/GB2234882B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
    • A61F11/145—Protective devices for the ears external, e.g. earcaps or earmuffs electric, e.g. for active noise reduction
    • 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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • 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
    • G10K11/1787—General system configurations
    • G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
    • 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
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3011—Single acoustic input
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3214—Architectures, e.g. special constructional features or arrangements of features
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/11—Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion

Landscapes

  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Signal Processing (AREA)
  • Biophysics (AREA)
  • Vascular Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Psychology (AREA)
  • Otolaryngology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
GB8917742A 1989-08-03 1989-08-03 Noise reduction system Expired - Fee Related GB2234882B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8917742A GB2234882B (en) 1989-08-03 1989-08-03 Noise reduction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8917742A GB2234882B (en) 1989-08-03 1989-08-03 Noise reduction system

Publications (3)

Publication Number Publication Date
GB8917742D0 GB8917742D0 (en) 1989-09-20
GB2234882A GB2234882A (en) 1991-02-13
GB2234882B true GB2234882B (en) 1994-01-12

Family

ID=10661088

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8917742A Expired - Fee Related GB2234882B (en) 1989-08-03 1989-08-03 Noise reduction system

Country Status (1)

Country Link
GB (1) GB2234882B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8571227B2 (en) 2005-11-11 2013-10-29 Phitek Systems Limited Noise cancellation earphone
US8666085B2 (en) 2007-10-02 2014-03-04 Phitek Systems Limited Component for noise reducing earphone
US9487295B2 (en) 2010-11-15 2016-11-08 William James Sim Vehicle media distribution system using optical transmitters

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995000946A1 (en) * 1993-06-23 1995-01-05 Noise Cancellation Technologies, Inc. Variable gain active noise cancellation system with improved residual noise sensing
US5604813A (en) * 1994-05-02 1997-02-18 Noise Cancellation Technologies, Inc. Industrial headset
GB2360165A (en) * 2000-03-07 2001-09-12 Central Research Lab Ltd A method of improving the audibility of sound from a loudspeaker located close to an ear
US6647368B2 (en) 2001-03-30 2003-11-11 Think-A-Move, Ltd. Sensor pair for detecting changes within a human ear and producing a signal corresponding to thought, movement, biological function and/or speech
US6671379B2 (en) * 2001-03-30 2003-12-30 Think-A-Move, Ltd. Ear microphone apparatus and method
DE60318335T2 (en) * 2003-05-09 2008-12-11 Widex A/S HEARING DEVICE SYSTEM, HEARING DEVICE AND METHOD FOR PROCESSING AUDIO SIGNALS
US7983433B2 (en) 2005-11-08 2011-07-19 Think-A-Move, Ltd. Earset assembly
WO2007147049A2 (en) 2006-06-14 2007-12-21 Think-A-Move, Ltd. Ear sensor assembly for speech processing
US9818394B2 (en) 2009-11-30 2017-11-14 Graeme Colin Fuller Realisation of controller transfer function for active noise cancellation
BR112012028245B1 (en) 2010-05-17 2021-04-20 Phitek Systems, Ltd. module support unit and video display unit
JP2014533444A (en) 2011-06-01 2014-12-11 フィテック システムズ リミテッドＰｈｉｔｅｋ Ｓｙｓｔｅｍｓ Ｌｉｍｉｔｅｄ In-ear device incorporating active noise reduction
EP3447762A1 (en) * 2017-08-23 2019-02-27 ams International AG Noise cancellation headphone
CN111625905B (en) * 2020-05-29 2023-08-04 中国航空工业集团公司西安飞机设计研究所 High-frequency simulation method for noise in cabin of propeller aircraft
FR3118526B1 (en) * 2020-12-24 2023-11-24 Focal Jmlab ACTIVE NOISE CANCELING HEADPHONES

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188210A (en) * 1986-03-21 1987-09-23 Univ Southampton Acoustic noise reduction in ear defenders

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188210A (en) * 1986-03-21 1987-09-23 Univ Southampton Acoustic noise reduction in ear defenders

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8571227B2 (en) 2005-11-11 2013-10-29 Phitek Systems Limited Noise cancellation earphone
US8666085B2 (en) 2007-10-02 2014-03-04 Phitek Systems Limited Component for noise reducing earphone
US9487295B2 (en) 2010-11-15 2016-11-08 William James Sim Vehicle media distribution system using optical transmitters

Also Published As

Publication number Publication date
GB2234882A (en) 1991-02-13
GB8917742D0 (en) 1989-09-20

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Legal Events

Date Code Title Description
730A Proceeding under section 30 patents act 1977
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20040803