GB1199925A - Improvements in or relating to Noise Reduction - Google Patents

Improvements in or relating to Noise Reduction

Info

Publication number
GB1199925A
GB1199925A GB40157/66A GB4015766A GB1199925A GB 1199925 A GB1199925 A GB 1199925A GB 40157/66 A GB40157/66 A GB 40157/66A GB 4015766 A GB4015766 A GB 4015766A GB 1199925 A GB1199925 A GB 1199925A
Authority
GB
United Kingdom
Prior art keywords
source
sound waves
adjacent
amplifier
emitted
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
GB40157/66A
Inventor
Ernest Alan Hinksman
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.)
MIDLAND TRANSFORMER Co LT
Original Assignee
MIDLAND TRANSFORMER Co LT
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 MIDLAND TRANSFORMER Co LT filed Critical MIDLAND TRANSFORMER Co LT
Priority to GB40157/66A priority Critical patent/GB1199925A/en
Publication of GB1199925A publication Critical patent/GB1199925A/en
Expired legal-status Critical Current

Links

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
    • 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
    • G10K11/1785—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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/125—Transformers
    • 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
    • G10K2210/3212—Actuator details, e.g. composition or microstructure
    • G10K2210/32121—Fluid amplifiers, e.g. modulated gas flow speaker using electrovalves
    • 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
    • G10K2210/3216—Cancellation means disposed in the vicinity of the source

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

1,199,925. Noise reduction. MIDLAND TRANSFORMER CO. Ltd. 22 Nov., 1967 [8 Sept., 1966], No. 40157/66. Heading H4J. In reducing noise emitted by a source, sound waves are picked up adjacent the source, a signal is generated from the sound waves, and sound waves are reproduced adjacent the source at approximately the same amplitude and frequency as the emitted sound waves and approximately 180 degrees out of phase with the emitted sound waves. The apparatus comprises, adjacent a source 10 (Fig. 1), a microphone 11 and moving coil loud-speaker 15 coupled by an amplifier 13. Phase change occurs in the amplifier 13 or by making appropriate loud-speaker connections. Alternatively, adjacent a source 16 (Fig. 2) are a microphone 17 and " Stentorphone " device 19 coupled by an amplifier 18 in which phase change occurs. In the device 19 pulsating blasts of compressed air from a source 20 are released into a horn by a valve 22 vibrated by electromagnetic means (not shown) in sympathy with the signal to be reproduced. Reduction of noise caused by a mechanical saw or by aircraft at an airport may be effected.
GB40157/66A 1966-09-08 1966-09-08 Improvements in or relating to Noise Reduction Expired GB1199925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB40157/66A GB1199925A (en) 1966-09-08 1966-09-08 Improvements in or relating to Noise Reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB40157/66A GB1199925A (en) 1966-09-08 1966-09-08 Improvements in or relating to Noise Reduction

Publications (1)

Publication Number Publication Date
GB1199925A true GB1199925A (en) 1970-07-22

Family

ID=10413468

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40157/66A Expired GB1199925A (en) 1966-09-08 1966-09-08 Improvements in or relating to Noise Reduction

Country Status (1)

Country Link
GB (1) GB1199925A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126837A (en) * 1982-08-19 1984-03-28 British Aerospace Noise suppression
GB2149273A (en) * 1983-11-02 1985-06-05 British Gas Corp Active control of flame noise
US4566118A (en) * 1981-11-26 1986-01-21 Sound Attenuators Limited Method of and apparatus for cancelling vibrations from a source of repetitive vibrations
EP0766288A2 (en) * 1995-09-28 1997-04-02 Siemens Aktiengesellschaft Device and method for treating semiconductor elements
EP1518638A1 (en) * 2003-09-02 2005-03-30 Schwäbische Werkzeugmaschinen GmbH Machine tool with active noise reduction
FR2962358A1 (en) * 2010-07-07 2012-01-13 Briot Int Optical glasses i.e. eyeglasses, machining device, has control unit controlling secondary noise and/or vibration source based on information measured by reference and error sensors to attenuate primary noise and/or primary vibration
EP2512748A1 (en) * 2009-12-15 2012-10-24 Robert Bosch GmbH Power tool
CN106531143A (en) * 2016-11-18 2017-03-22 国网上海市电力公司 Coupling feedforward active noise control system
CN109319160A (en) * 2017-08-01 2019-02-12 松下电器（美国）知识产权公司 Unmanned vehicle

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566118A (en) * 1981-11-26 1986-01-21 Sound Attenuators Limited Method of and apparatus for cancelling vibrations from a source of repetitive vibrations
GB2126837A (en) * 1982-08-19 1984-03-28 British Aerospace Noise suppression
GB2149273A (en) * 1983-11-02 1985-06-05 British Gas Corp Active control of flame noise
EP0766288A2 (en) * 1995-09-28 1997-04-02 Siemens Aktiengesellschaft Device and method for treating semiconductor elements
EP0766288A3 (en) * 1995-09-28 1998-06-10 Siemens Aktiengesellschaft Device and method for treating semiconductor elements
EP1518638A1 (en) * 2003-09-02 2005-03-30 Schwäbische Werkzeugmaschinen GmbH Machine tool with active noise reduction
EP2512748A1 (en) * 2009-12-15 2012-10-24 Robert Bosch GmbH Power tool
FR2962358A1 (en) * 2010-07-07 2012-01-13 Briot Int Optical glasses i.e. eyeglasses, machining device, has control unit controlling secondary noise and/or vibration source based on information measured by reference and error sensors to attenuate primary noise and/or primary vibration
CN106531143A (en) * 2016-11-18 2017-03-22 国网上海市电力公司 Coupling feedforward active noise control system
CN109319160A (en) * 2017-08-01 2019-02-12 松下电器（美国）知识产权公司 Unmanned vehicle
CN109319160B (en) * 2017-08-01 2023-07-07 松下电器（美国）知识产权公司 Unmanned aerial vehicle

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees