WO2017049337A1 - Améliorations apportées à la gestion du son ambiant à l'intérieur de structures bâties - Google Patents

Améliorations apportées à la gestion du son ambiant à l'intérieur de structures bâties Download PDF

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Publication number
WO2017049337A1
WO2017049337A1 PCT/AU2016/000330 AU2016000330W WO2017049337A1 WO 2017049337 A1 WO2017049337 A1 WO 2017049337A1 AU 2016000330 W AU2016000330 W AU 2016000330W WO 2017049337 A1 WO2017049337 A1 WO 2017049337A1
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WO
WIPO (PCT)
Prior art keywords
sound
barrier
barrier element
signal
space
Prior art date
Application number
PCT/AU2016/000330
Other languages
English (en)
Inventor
Matthew Ross DARLING
Original Assignee
Darling Matthew Ross
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
Priority claimed from AU2015903928A external-priority patent/AU2015903928A0/en
Application filed by Darling Matthew Ross filed Critical Darling Matthew Ross
Publication of WO2017049337A1 publication Critical patent/WO2017049337A1/fr

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
    • G10K11/1785—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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • 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
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • 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
    • G10K2210/12—Rooms, e.g. ANC inside a room, office, concert hall or automobile cabin
    • 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
    • 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
    • G10K2210/3229—Transducers

Definitions

  • the present invention relates to improvements in ambient sound management and, more particularly, although not exclusively, to sound management in open spaces partitioned from other spaces.
  • W02012012452 assigned to Athanas Acoustic Devices LLC also discloses utilisation of an “active noise cancellation device” in the form of one or more directional loudspeakers working in conjunction with directional microphones to create “open air active noise cancellation systems ".
  • US 20100124336 assigned to Harman International industries describes an active noise control system for generating an antinoise signal to drive a speaker to produce sound waves to destructively interfere with an undesired sound in a targeted space.
  • a method of sound management of a space which is defined by at least one barrier element; said method comprising sensing ambient sound to reduce or eliminate the ambient sound as it travels through a barrier by applying a signal to the barrier.
  • the signal is produced by generating counter-frequencies or alternate non- audible frequencies and applying them to the barrier thereby to disrupt the vibrations of the barrier that allow the transmission of sound from one side of the barrier to the other.
  • the counter-frequencies, anti-phase frequencies or alternate inaudible frequencies to vibrations derived from the ambient sound are calculated by sensing and processing the ambient sound and are then applied as a cancellation signal to the barrier element thereby causing the barrier element to vibrate such that audible sound space transmitted through the barrier is reduced or eliminated.
  • a system for sound management of a space which is defined by at least one barrier element; said system sensing ambient sound in order to reduce or eliminate the ambient sound as it travels through the banier element by applying a signal derived from the ambient sound to the barrier element.
  • the signal is produced by generating counter-frequencies or alternate non- audible frequencies and applying them to the barrier thereby to disrupt the vibrations of the barrier that allow the transmission of sound from one side of the barrier to the other.
  • the counter- frequencies, anti-phase frequencies or alternate inaudible frequencies to vibrations derived from the ambient sound are calculated by sensing and processing the ambient sound and are then applied as a cancellation signal to the barrier element thereby causing the barrier element to vibrate such that audible sound space transmitted through the barrier is reduced or eliminated.
  • the system also tests and tunes frequency output to particular banier characteristics in order to optimise performance and prevent potentially harmful resonations that could damage the banier.
  • a method of sound management of a space which is defined by at least one barrier element; said method comprising sensing ambient sound to produce an ambient sound signal; processing the ambient sound signal to generate a cancellation signal; applying the cancellation signal to the banier element thereby to cause the banier element to vibrate such that sound in the space is managed.
  • the barrier element is a window pane.
  • the barrier element is comprised of glass.
  • the barrier element is comprised of a plastics material.
  • the diaphragm is caused to vibrate such that at least some unwanted sound within the space is damped.
  • At least some of the unwanted sound derives from a source on the opposite side of the barrier element to the space.
  • management comprises sensing at least first and second components of sound within the space; defining and redefining the components such that the first component represents wanted sound and the second component represents unwanted sound; management further comprising causing the barrier element to vibrate such that the second component is damped within the space whilst the first component is not damped.
  • a method of sound management of a space which is defined by at least one barrier element; said method comprising reducing the ambient sound as it travels through the barrier element by applying a signal to the barrier element.
  • the signal is produced by generating counter-frequencies, applying them to the barrier element thereby disrupting the vibrations of the barrier element that allow the
  • the signal is produced by generating anti-phase frequencies and applying them to the barrier element thereby disrupting the vibrations of the barrier element that allow the transmission of sound from one side of the barrier element to the other.
  • the signal is produced by generating non-audible frequencies and applying them to the barrier element thereby disrupting the vibrations of the barrier element that allow the transmission of sound from one side of the barrier element to the other.
  • one or more of the counter-frequencies, anti-phase frequencies or alternate inaudible frequencies to vibrations derived from the ambient sound are calculated by sensing and processing the ambient sound and are then applied as a cancellation signal to the barrier element thereby causing the barrier element to vibrate such that audible sound space transmitted through the T/AU2016/000330
  • a system for sound management of a space which is defined by at least one barrier element; said system sensing ambient sound in order to reduce the ambient sound as it travels through the barrier element by applying a signal derived from the ambient sound to the barrier element.
  • the signal is produced by generating counter-frequencies and applying them to the barrier thereby to disrupt the vibrations of the barrier that allow the transmission of sound from one side of the barrier to the other.
  • the signal is produced by generating anti-phase frequencies and applying them to the barrier thereby to disrupt the vibrations of the barrier that allow the transmission of sound from one side of the barrier to the other.
  • the signal is produced by generating non-audible frequencies and applying them to the barrier thereby to disrupt the vibrations of the barrier that allow the transmission of sound from one side of the barrier to the other.
  • one or more of the counter-frequencies, anti-phase frequencies or alternate inaudible frequencies to vibrations derived from the ambient sound are calculated by sensing and processing the ambient sound and are then applied as a cancellation signal to the barrier element thereby causing the barrier element to vibrate such that audible sound space transmitted through the barrier is reduced or eliminated.
  • the system also tests and tunes frequency output to particular barrier characteristics in order to optimise performance and prevent potentially harmful resonations that could damage the barrier.
  • a communication signal is provided by a controller which drives an audible signal into the barrier for on-propagation into the space.
  • the communication signal is a verbal announcement.
  • the communication signal is music.
  • a composite signal is injected into the barrier whereby the barrier functions both as an enhanced sound deadening device and also as a form of "loudspeaker” for dissemination of audible information to people within the space where the sound is to be controlled.
  • a method of sound management of a space which is defined by at least one barrier element; said method comprising sensing ambient sound to produce an ambient sound signal; processing the ambient sound signal to generate a cancellation signal; applying the cancellation signal to the barrier element thereby to cause the barrier element to vibrate such that sound in the space is modified.
  • the barrier element is a window pane.
  • the barrier element is comprised of glass.
  • the barrier element is comprised of a plastics material.
  • a method of sound management of a space comprising utilising a barrier element which defines at least a part of the space as a diaphragm of an acoustic transducer.
  • the diaphragm is caused to vibrate such that at least some unwanted sound within the space is damped.
  • At least some of the unwanted sound derives from a source on the opposite side of the barrier element to the space.
  • management comprises sensing at least first and second components of sound within the space; defining and redefining the components such that the first component represents wanted sound and the second component represents unwanted sound; management further comprising causing the barrier element to vibrate such that the second component is damped within the space whilst the first component is not damped.
  • Figure 1 graphically illustrates an environment applicable to embodiments of the present invention
  • Figure 2 graphically illustrates a generalised application of the technique of an embodiment of the present invention
  • FIG. 3 diagrammatically illustrates an adaptive technique applied to the embodiment of figure 2
  • Figure 4 is a block diagram of components forming an apparatus for application of the method of embodiments of the present invention
  • Figure 5 illustrates an application of the apparatus of figure 4.
  • Figure 6 is a second example of an application of an embodiment of the present invention.
  • Figure 1 graphically illustrates an environment applicable to embodiments of the present invention
  • a typical scenario involves an ambient sound 100 generated by a point source or otherwise impinging on an element 101 which may, for example, be a barrier element made of glass or plastics material.
  • the barrier element 101 defines a space 103 on the far side of glass from the ambient sound 100 but in which sound waves 102 will be heard arising from vibration of the element 101 caused by the ambient sound 100.
  • Figure 2 graphically illustrates a generalised application of the technique of an embodiment of the present invention
  • control apparatus 200 and 104 is affixed to barrier or element 201.
  • the barrier 201 is caused to vibrate by the ambient sound 200 but a cancelling vibration is applied to the element 201 by control apparatus 204 such that the waves 102 become damped waves 203 thereby managing sound experienced within space 103.
  • Figure 3 diagrammatically illustrates an adaptive technique applied to the embodiment of figure 2
  • control apparatus 304 senses a change in vibration of the element 301 arising from a change in the ambient sound 300 impinging on the element 301 and thereby varies the vibration it induces in element 301 in order to continue to damped the consequent sound waves flowing into space 103 in the form of reduced sound waves 303.
  • Figure 4 is a block diagram of components forming an apparatus 404 for application of the method of embodiments of the present invention
  • the apparatus 404 comprises a controller 402 powered by power source 400 and receiving ambient sound infomiation from sent source 401.
  • the ambient sound infomiation he said as a signal to controller 402 which processes the signals in order to drive oscillator 403 to produce a cancelling oscillation which is applied mechanically to element 101, 201, 301 thereby to produce a reduced or damped soundwave 203, 303 as illustrated in previous figures.
  • Figure 5 illustrates an application of the apparatus of figure 4 where components are numbered as for those of figure 4 except in the 500 series.
  • the barrier element 101 may comprise a substantially planar class barrier interposed between a noise source in this instance in the form of truck 601 and space 610.
  • apparatus 404 is affixed mechanically to a portion of the element 101 as illustrated thereby to utilise the element 101 in effect as a diaphragm for an acoustic speaker and use vibrations are controlled by the actions of control 404 thereby to manage the acoustic environment 610. More particularly in the present instance, the controller 404 separates the sound it senses into at least a first component and a second component.
  • the first component can be, for example, what might be termed general background noise.
  • the second component in this instance, comprises polluting noise in the form of sound emanating from the vehicle 601.
  • the controller defines and redefines the cut-off as between the background noise and the polluting noise-that is to say as between the first component and the second component thereby to finally define the first component and second component.
  • the process of 404 then causes element 101 to vibrate mechanically so as to substantially damp the second component in element 101 thereby to substantially damp transmission of the second component into the controlled space 610.
  • the controller is driving a signal into the barrier so that it vibrates in a way which enhances its properties of sound dampening.
  • Most mechanical barrier elements will dampen sound waves seeking to pass from one side of the barrier to the other.
  • embodiments of the invention cause oscillations or vibrations in the barrier in order to selectively enhance the dampening.
  • a method of sound management of a space which is defined by at least one barrier element; the method comprising sensing ambient sound to reduce or eliminate the sound as it travels through a barrier.
  • This effect may be achieved by generating counter- frequencies or alternate non-audible frequencies that disrupt the vibrations of the barrier that allow the transmission of sound from one side of the barrier to the other.
  • Counter-frequencies, anti-phase frequencies or alternate inaudible frequencies to vibrations caused by ambient sound are calculated by sensing and processing the ambient sound and applying the cancellation signal to the barrier element thereby causing the barrier element to vibrate such that audible sound space transmitted through the barrier is reduced or eliminated.
  • the system also tests and tunes frequency output to particular barriers characteristics to optimise performance and prevent potentially harmful resonations that could damage the barrier.
  • the controller may drive an audible signal into the barrier for propagation into the space.
  • the signal may be a verbal announcement. In other forms it may be music.
  • the barrier functions both as an enhanced sound deadening device and also as a form of "loudspeaker" for dissemination of audible information to people within the space where the sound is to be controlled.
  • the device may be retrofitted or it may be made integral to the barrier or the frame around the barrier/ glass.
  • a transducer 404 comprises an oscillator 403 in this instance in the form of a solenoid whose movable core 403A is mechanically linked to the barrier element 401 via flexible linkage 403 B.
  • the solenoid is driven by input output driver circuitry 412 which in turn is driven by processor 413 executing instructions 414 residing in memory 415.
  • the instructions 414 process signal input 416 received from sensor 41 1 which in this instance also comprises a solenoid with a movable core acting as a diaphragm.
  • a piezo electric sensor may be utilised to perform the function of generating signal 416 for input to processor 413.
  • the assembly thus described acts to perform the function of the controller 402.
  • the graphs in Figure 6 illustrate the frequency domain situation for a scenario where only a single frequency Fl of amplitude Al impinges upon the barrier.
  • the transducer 404 applies the same single frequency Fl but of amplitude minus Al to the barrier 101 thereby to substantially cancel the single frequency Fl as it passes through the barrier 101.
  • the transducer 404 can inject an additional frequency of F2 of amplitude B 1 into the barrier for on-transmission into the space.
  • multiple frequencies Fl would comprise the incoming sound and require multiple corresponding negative amplitude frequencies for the purposes of substantial cancellation.
  • the additional frequency F2 can comprise multiple frequencies thereby to communicate a voice signal or a music signal.
  • the microprocessor 413 may be replaced by a digital signal processor (DSP) device in order to more efficiently model the required frequencies and drive the transducer 404 in the frequency domain.
  • DSP digital signal processor

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne un procédé de gestion du son d'un espace qui est défini par au moins un élément formant barrière ; ledit procédé consistant à réduire ou à supprimer le son ambiant à mesure qu'il se déplace à travers l'élément formant barrière par application d'un signal à l'élément formant barrière.
PCT/AU2016/000330 2015-09-26 2016-09-26 Améliorations apportées à la gestion du son ambiant à l'intérieur de structures bâties WO2017049337A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2015903928A AU2015903928A0 (en) 2015-09-26 Improvements in ambient sound management within built structures.
AU2015903928 2015-09-26

Publications (1)

Publication Number Publication Date
WO2017049337A1 true WO2017049337A1 (fr) 2017-03-30

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5627897A (en) * 1994-11-03 1997-05-06 Centre Scientifique Et Technique Du Batiment Acoustic attenuation device with active double wall
US6023123A (en) * 1995-05-02 2000-02-08 Hollandse Signaalapparaten B.V. Acoustic vibration generator
US6031917A (en) * 1997-06-06 2000-02-29 Mcdonnell Douglas Corporation Active noise control using blocked mode approach
US6041125A (en) * 1996-08-15 2000-03-21 Mitsubishi Jukogyo Kabushiki Kaishal Active acoustic wall
US20010031052A1 (en) * 2000-03-07 2001-10-18 Lock Christopher Colin Noise suppression loudspeaker
US20030002687A1 (en) * 1999-11-16 2003-01-02 Andreas Raptopoulos Apparatus for acoustically improving an environment and related method
US20090301805A1 (en) * 2008-06-03 2009-12-10 Isao Kakuhari Active noise control system
US7894613B1 (en) * 2006-05-10 2011-02-22 Oracle America, Inc. Active noise control rack enclosures
US20110110527A1 (en) * 2008-07-09 2011-05-12 Kyushu Institute Of Technology Active muffler

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5627897A (en) * 1994-11-03 1997-05-06 Centre Scientifique Et Technique Du Batiment Acoustic attenuation device with active double wall
US6023123A (en) * 1995-05-02 2000-02-08 Hollandse Signaalapparaten B.V. Acoustic vibration generator
US6041125A (en) * 1996-08-15 2000-03-21 Mitsubishi Jukogyo Kabushiki Kaishal Active acoustic wall
US6031917A (en) * 1997-06-06 2000-02-29 Mcdonnell Douglas Corporation Active noise control using blocked mode approach
US20030002687A1 (en) * 1999-11-16 2003-01-02 Andreas Raptopoulos Apparatus for acoustically improving an environment and related method
US20010031052A1 (en) * 2000-03-07 2001-10-18 Lock Christopher Colin Noise suppression loudspeaker
US7894613B1 (en) * 2006-05-10 2011-02-22 Oracle America, Inc. Active noise control rack enclosures
US20090301805A1 (en) * 2008-06-03 2009-12-10 Isao Kakuhari Active noise control system
US20110110527A1 (en) * 2008-07-09 2011-05-12 Kyushu Institute Of Technology Active muffler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ISE ET AL.: "Basic study on active noise barrier.", JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN (E), vol. 12, no. 6, 1999, pages 299 - 306, XP055370005, Retrieved from the Internet <URL:http://ci.nii.ac.jp/lognavi?name=nels&lang=en&type=pdf&id=ART0003508716> *

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