[go: up one dir, main page]

WO1993008560A1 - Dispositif d'insonorisation - Google Patents

Dispositif d'insonorisation Download PDF

Info

Publication number
WO1993008560A1
WO1993008560A1 PCT/GB1992/001916 GB9201916W WO9308560A1 WO 1993008560 A1 WO1993008560 A1 WO 1993008560A1 GB 9201916 W GB9201916 W GB 9201916W WO 9308560 A1 WO9308560 A1 WO 9308560A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
barrier member
sound
control
transmitted
Prior art date
Application number
PCT/GB1992/001916
Other languages
English (en)
Inventor
Anthony John Salloway
Robert Christopher Twiney
Original Assignee
Gec-Marconi Limited
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 Limited filed Critical Gec-Marconi Limited
Publication of WO1993008560A1 publication Critical patent/WO1993008560A1/fr

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods 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
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178Methods 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
    • G10K11/1785Methods, e.g. algorithms; Devices
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods 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
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178Methods 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
    • G10K11/1785Methods, e.g. algorithms; Devices
    • G10K11/17857Geometric disposition, e.g. placement of microphones
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods 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
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178Methods 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
    • G10K11/1787General system configurations
    • G10K11/17875General system configurations using an error signal without a reference signal, e.g. pure feedback
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/102Two dimensional
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/12Rooms, e.g. ANC inside a room, office, concert hall or automobile cabin
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/129Vibration, e.g. instead of, or in addition to, acoustic noise
    • G10K2210/1291Anti-Vibration-Control, e.g. reducing vibrations in panels or beams
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/301Computational
    • G10K2210/3011Single acoustic input
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/321Physical
    • G10K2210/3223Materials, e.g. special compositions or gases
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/321Physical
    • G10K2210/3229Transducers
    • G10K2210/32291Plates or thin films, e.g. PVDF

Definitions

  • the invention relates to a sound control device for controlling sound transmitted through and/or reflected from a barrier member.
  • a low volume/low mass system capable of producing significant acoustic isolation and/or absorption would be of significant use in vehicle cabins, workshop 's , engine rooms and radiated noise of ships, and the l ike where reduction of noise is desired.
  • An active noise reduction system is known to be very effective at low frequencies where wavelengths are long, so that little phase difference occurs between the generated and sensed sounds.
  • this type of system has a good attenuation at low frequencies and can complement a passive system (good attenuation at h ⁇ oi frequencies) to achieve a good overall reduction across a wide frequency range.
  • Active noise control systems have been used in the past to demonstrate control of reflection coefficient but have used discrete transducers for example conventional moving coil transducers such as loudspeakers.
  • a sound control device for controll ing sound transmitted through and/or reflected from a barrier member, the device comprising sensor means to sense said transmitted and/or reflected sound and to produce a signal representing the transmitted and/or reflected sound, an actuator mounted on said barrier member and arranged to conform to at least one surface of the barrier member and control means responsive to said signal to provide a control signal to the actuator.
  • the present invention uses an active method to control the radiated and/or reflected noise from the barrier member by the use of an active system comprising the acoustic sensor, control electronics and the distributed actuator as a conformal layer or coating arranged on at least one surface of the support member or barrier member.
  • the principal advantage is that the acoustic impedance match to the surrounding medium can either be i ⁇ proved which reduces the acoustic reflection or decreased which increases the decoupl ing between the two surfaces.
  • the actuator may be made of a flexible piezo-electri c material , such as a piezo-ceramic/polymer composite.
  • the composite includes ceramic materials such as PT (Lead Titanate) or PZT (Lead Zirconate Titanate) dispersed in a polymer.
  • the piezo-electric material may be a polymer of vinyl idene fluoride or a copolymer of vinyl idene fluoride and trifluoroethylene.
  • the actuator may be in the form of a flexible layer or coating provided on at least one surface of said barrier member.
  • the actuator and sensor are integrated into a single structure arranged to conform to the surface of said barrier member.
  • the actuator, sensor and control means may be integrated into a combined unit.
  • the control means may provide a phased control signal to the acuator so as to cancel the signal sensed by said sensor means.
  • Figure 1 il lustrates a noise control device embodying the present invention.
  • Figure 2 il lustrates another embodiment of the noise control device of the present invention.
  • the noise control device as shown in Figures 1 and 2 is arranged on one side of the support member or barrier member 10.
  • the device includes an actuator 11 of a flexible piezoelectric material for example piezoceramic material embedded in polymer matrix.
  • the flexible layer of piezoelectric material is arranged to conform to a surface 14 of the barrier member 10 and a pressure sensor 11 is arranged over the actuator 12 as shown in Figure 1.
  • the sensor 11 and the actuator 12 are formed as an integral unit in which the sensor 11 is surrounded by the actuator 12 and the flexible integral unit is arranged to conform to the surface 14 of the barrier member 10.
  • the sensor 11 in both embodiments is connected to a control device or processing electronic 13.
  • the sensor 11 produces a signal representing the noise detected by the sensor.
  • the acoustic noise detected by the sensor may be a noise transmitted through the barrier member to the surface 14 or it may be the noise reflected from the surface 14 of the barrier member 10.
  • the control device in response to the detected signal received from the sensor, may provide an inverted phase signal to the actuator to cancel the acoustic noise signal received from the sensor.
  • a conformal actuator as part of the noise control system, it is possible to produce large area noise control systems as illustrated schematically in Figures 1 and 2.
  • the output from the pressure sensor which may be mechanically decoupled or directly coupled to the actuator is electrically filtered and amplified to provide drive to the actuator material.
  • the system may feeback phase inverted or same phase signals to the actuator compared to the sensor output.
  • the phase of the electronic control loop it is possible to produce a material interface with an apparently improved acoustic impedance match to the surrounding medium (water or air), and thus reduce acoustic reflection from the interface.
  • the system can increase the decoupling between the two surfaces by decreasing the acoustic impedance match.
  • the use of a large area transducer which is conformal allows the system to be applied to non-planar surfaces and greatly simplifies the implementation of the system.
  • the control electronics may be physically remote from the sensor/actuator combi nat on or may be integrated into the combined unit to provide a so-cal led 'smart ' material .
  • Distributed actuator materials which offer particular advantage are dispersions of piezoelectric ceramic in a polymer carrier (so-cal led '0-3' composite) , ceramic rods in polymer with or without a glass reinforcement phase and pure piezoelectric polymers.
  • the use of a large area transducer material allows tranducers elements to be defined by electrode definition and even allows sensor and actuator functions to be integrated into the same material .
  • the noise control layer (sensor/actuator) may be appl ied as a conformal coating to the required structure where it can then control the reflected and/or radiated sound.

Landscapes

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

Abstract

L'invention se rapporte à un dispositif d'insonorisation permettant de réguler le niveau de bruit transmis à travers un élément barrière (10) et/ou réfléchi à partir de cet élément. Le dispositif comprend un détecteur (11) servant à détecter le bruit transmis et/ou réfléchi et à produire un signal représentant le bruit transmis et/ou réfléchi, un actionneur (12) monté sur ledit élément barrière (10) et agencé de façon à épouser la forme d'au moins une surface (14) de l'élément de commande (13) sensible audit signal afin de fournir un signal de commande à l'actionneur (12). Celui-ci peut être fabriqué à partir d'une céramique piézoélectrique dispersée dans un matériau polymère.
PCT/GB1992/001916 1991-10-21 1992-10-19 Dispositif d'insonorisation WO1993008560A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9122323.0 1991-10-21
GB9122323A GB2260874A (en) 1991-10-21 1991-10-21 A sound control device

Publications (1)

Publication Number Publication Date
WO1993008560A1 true WO1993008560A1 (fr) 1993-04-29

Family

ID=10703283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/001916 WO1993008560A1 (fr) 1991-10-21 1992-10-19 Dispositif d'insonorisation

Country Status (3)

Country Link
EP (1) EP0563355A1 (fr)
GB (1) GB2260874A (fr)
WO (1) WO1993008560A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6648750B1 (en) 1999-09-03 2003-11-18 Titon Hardware Limited Ventilation assemblies
CN107146600A (zh) * 2017-06-30 2017-09-08 武汉理工大学 船用柴油机噪声综合处理装置及方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315661A (en) * 1992-08-12 1994-05-24 Noise Cancellation Technologies, Inc. Active high transmission loss panel
US5498127A (en) * 1994-11-14 1996-03-12 General Electric Company Active acoustic liner
IT1268204B1 (it) * 1994-12-28 1997-02-21 Fiat Auto Spa Sistema per la riduzione del rumore dovuto a vibrazioni di un veicolo.
GB2312972B (en) * 1996-05-11 2000-02-09 Marconi Gec Ltd Vibration control
GB9927131D0 (en) * 1999-11-16 2000-01-12 Royal College Of Art Apparatus for acoustically improving an environment and related method
AT411367B (de) * 2001-01-17 2003-12-29 M2 Master Man Gesmbh Lärmschutzvorrichtung bestehend aus aktiven breitbandigen schalldämpfern

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3713780A1 (de) * 1986-04-30 1987-11-05 Elin Union Ag Anordnung zur daempfung, reduzierung bzw. kompensation von schallwellen bzw. geraeuschen
US5024092A (en) * 1990-08-16 1991-06-18 Westinghouse Electric Corp. Method and apparatus for selective transmission and reflection of sound through a solid

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814093C2 (de) * 1978-04-01 1980-05-14 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Antischallgeber
EP0041954A1 (fr) * 1979-11-10 1981-12-23 Sound Attenuators Limited Suppression des vibrations transmises par un fluide dans un conteneur
JPS5827313A (ja) * 1981-08-11 1983-02-18 Hitachi Ltd 静止誘導電器の振動低減方法
JPS5895806A (ja) * 1981-12-02 1983-06-07 Hitachi Ltd 静止誘導電器の防音装置
US4565940A (en) * 1984-08-14 1986-01-21 Massachusetts Institute Of Technology Method and apparatus using a piezoelectric film for active control of vibrations
EP0434468A3 (en) * 1989-12-22 1992-05-27 Bridgestone Corporation Vibration control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3713780A1 (de) * 1986-04-30 1987-11-05 Elin Union Ag Anordnung zur daempfung, reduzierung bzw. kompensation von schallwellen bzw. geraeuschen
US5024092A (en) * 1990-08-16 1991-06-18 Westinghouse Electric Corp. Method and apparatus for selective transmission and reflection of sound through a solid

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA. vol. 90, no. 3, 1 September 1991, NEW YORK US pages 1230 - 1237 L.DWYNN LAFLEUR E.A, 'Acoustically active surfaces us' *
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA. vol. 91, no. 2, 1 February 1992, NEW YORK US pages 823 - 831 T.R.HOWARTH E.A. 'Piezocomposite coating for active underwater sound reduction' *
SOVIET PHYSICS ACOUSTICS. vol. 30, no. 6, 1 November 1984, NEW YORK US pages 440 - 443 V.N.BELYI E.A. 'Influence of an electric field on the reflection of an ultrasonic wave from a ceramic plate in a fluid' *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6648750B1 (en) 1999-09-03 2003-11-18 Titon Hardware Limited Ventilation assemblies
CN107146600A (zh) * 2017-06-30 2017-09-08 武汉理工大学 船用柴油机噪声综合处理装置及方法

Also Published As

Publication number Publication date
GB2260874A (en) 1993-04-28
EP0563355A1 (fr) 1993-10-06
GB9122323D0 (en) 1992-11-18

Similar Documents

Publication Publication Date Title
AU2020251740B2 (en) Structural damper
Howarth et al. Piezocomposite coating for active underwater sound reduction
US6023123A (en) Acoustic vibration generator
EP0258948B1 (fr) Transducteur à disque de flexion avec une cavité résonante
EP3716263A1 (fr) Amortisseur structural
US4928264A (en) Noise-suppressing hydrophones
EP1573716A2 (fr) Systeme d'attenuation de bruit pour vehicules
WO1993008560A1 (fr) Dispositif d'insonorisation
EP0434468A2 (fr) Dispositif de commande de vibrations
US6031917A (en) Active noise control using blocked mode approach
US5452265A (en) Active acoustic impedance modification arrangement for controlling sound interaction
GB2582905A (en) Structural damper
Shields et al. Smart acoustically active surfaces
EP1266539A1 (fr) Panneau de transducteur acoustique
US6788794B2 (en) Thin, lightweight acoustic actuator tile
Ji et al. An improved system of active noise isolation using a self-sensing actuator and neural network
JP2928861B2 (ja) 音響センサ
Gentry-Grace A study of smart foam for noise control applications
Guigou et al. Foam-PVDF smart skin for aircraft interior sound control
JP3310764B2 (ja) 超音波送受波器
Sampath et al. Active structural acoustic control of band-limited disturbances
Gentilman et al. Piezocomposite SmartPanels for active control of underwater vibration and noise
Salloway The active control of underwater sound using piezoelectric materials
JP3364546B2 (ja) 超音波送受波器
Tressler et al. Piezocomposite Design, Manufacture, and Applications

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL SE

WWE Wipo information: entry into national phase

Ref document number: 1992921657

Country of ref document: EP

ENP Entry into the national phase

Ref country code: US

Ref document number: 1993 75537

Date of ref document: 19930809

Kind code of ref document: A

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1992921657

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1992921657

Country of ref document: EP