EP3061271A1 - Système à synthèse de front d'ondes - Google Patents

Système à synthèse de front d'ondes

Info

Publication number
EP3061271A1
EP3061271A1 EP14781270.5A EP14781270A EP3061271A1 EP 3061271 A1 EP3061271 A1 EP 3061271A1 EP 14781270 A EP14781270 A EP 14781270A EP 3061271 A1 EP3061271 A1 EP 3061271A1
Authority
EP
European Patent Office
Prior art keywords
sound transducers
sound
wave field
reference point
transducers
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.)
Granted
Application number
EP14781270.5A
Other languages
German (de)
English (en)
Other versions
EP3061271B1 (fr
Inventor
Frank Stefan SCHMIDT
Helmut Oellers
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.)
Holoplot GmbH
Original Assignee
Advanced Acoustic SF GmbH
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 Advanced Acoustic SF GmbH filed Critical Advanced Acoustic SF GmbH
Priority to PL14781270T priority Critical patent/PL3061271T3/pl
Publication of EP3061271A1 publication Critical patent/EP3061271A1/fr
Application granted granted Critical
Publication of EP3061271B1 publication Critical patent/EP3061271B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/401—2D or 3D arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/13—Application of wave-field synthesis in stereophonic audio systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation

Definitions

  • the present invention relates to a device of sound transducers according to the principle of wave field synthesis.
  • the principle of wave field synthesis realizes the "acoustic curtain." In its range, all the sound sources and also the reflections of these sound sources in the recording room can be physically reconstructed in all three spatial dimensions, thus reproducing in a source-free reproduction area the acoustics of the recording room arise.
  • the method of wave field synthesis is therefore usually reduced to a horizontal series of transducers placed around the listener. This also reduces the playback to this horizontal level, correct spatial reproduction is no longer possible.
  • the cylindrical propagation of the wavefronts then requires that the acoustics of the playback room must be completely suppressed.
  • the object of the invention is therefore to describe a device that is portable for practical reasons and in the computing power in the
  • the device of sound transducers according to the principle of
  • Wave field synthesis not as a closed unit, as described for example in [6] to execute, but to build decentralized.
  • the individual modules are usually executed the same way.
  • An enclosing housing may allow a modular design. This has the advantage that the modules are interchangeable and that they only have to be assigned to a position in the coordinate system during the setup process of the system. In addition, they can be preassembled and pre-wired for live PA in groups to ensure a quick setup of the system.
  • All audio signals can then be routed in a common line to each module.
  • the data for the delay times and levels for each individual transducer can be transmitted very effectively with a serial transmission protocol if the model - based approach of the
  • Wave field synthesis is used. All audio channels of the system are then routed to all modules in a data stream.
  • the additional amount of data to be transmitted to the modules for the calculation of the signals for each individual transducer in a second data stream is comparatively very small.
  • the synthesis of content, ie the audio signals themselves, and form, ie the associated data, is then no longer carried out according to the invention in a central unit, but autonomously in each modular unit. Because of the modular design, no more differentiated data or individual audio signals for each individual transducer must be transmitted.
  • the data stream which is fed from the central unit to all modules, only contains the vector of each virtual sound source to be displayed to a single reference point in the system.
  • the vector of a in all modules, the same reference point of the relevant module to this common reference point is known, because it results from the edge lengths of the modules or modules and their position within the array of transducers.
  • the vectors of each individual transducer are stored to this reference point.
  • the vector addition of the reference point of the arrangement of sound transducers for Coordinate origin plus vector of the reference point of the module to the reference point of the arrangement of sound transducers plus vector of the respective sound transducer to the reference point of the module gives the exact position of the respective sound transducer to
  • the audio signals are convoluted into the respective impulse responses in a central processing unit, and the output of this convolution is sent to the individual output amplifiers.
  • Source positions can follow very quickly the natural location changes of the original sound sources and their first high-sound reflections, so is the representation of
  • the modular structure of the wave field synthesis system creates another fundamental advantage. Since the amount of data to be transferred and the computational effort in the central unit is independent of the number of modules or modules connected, the system becomes freely scalable. So not only the usual reduction of the Be easily overcome on the horizontal level of the listener. Even very large acoustic curtains with directional effects down to the bass range and tightly focused concave wavefronts can be realized.
  • modules could also be assembled into a physical structure, such as a cube or cuboid, in which virtual sound sources emit to the outside.
  • microstructures could be used for a combined reproduction of auditory and visual information.
  • FIGS. 1 and 2 The device is shown in FIGS. 1 and 2. It will be explained with reference to these drawings.
  • Fig. 1 shows a modular device of sound transducers according to the principle of wave field synthesis (1). With her virtual sound sources (2) are shown, the position of which is given in a coordinate system with respect to the coordinate origin (3).
  • the coordinate origin may be at the position of a listener in the playback room, but it may be set arbitrarily. In any case, the vector of a
  • Reference point (4) of the device may be known from sound transducers to this coordinate origin. Then the respective reference point in each of the modules (5) in the Device from Schallwandlem given by the placement of the module in the system and the edge length of the modules. In the module, the position of each individual transducer (6) is given to each individual transducer.
  • the position of each individual virtual sound source can be determined to each individual transducer by adding the individual vectors.
  • FIG. 2 shows that all the audio signals and data are routed to each module. This can be done via separate lines (1) and (2) or all information can also be transmitted via a common protocol to the modules.
  • the amount of data is relatively small because only the position of the virtual sources in the coordinate system and their assignment to the audio signals must be transmitted. This allows an update of the positions in very short time intervals.
  • the signals of all input sources delayed and added up from all according to the module position in the arrangement of sound transducers of all input sources can be fed to the corresponding power amplifier for the few transducers in the module.
  • the audio signal will appear on the playback page in a renderer for each
  • the starting points of the elementary waves should be close together.
  • the virtual sound sources can only arise in the area of the arrangement of sound transducers. Therefore, their number becomes very large when a two-dimensional sound transducer surface is built up.
  • the requirements for the renderer prior art systems increase, the control of a large number of transducers requires a high computational effort.
  • the principle of wave field synthesis was therefore usually reduced to a horizontal transducer array.
  • the wave field synthesis is usually on the listener's horizontal plane is reduced, the third dimension is lost in the reproduction of the sound events.
  • the necessary computing power can be distributed decentrally, because the amount of data to be transmitted between the subsystems does not increase with the number of sound transducers.
  • the system becomes freely scalable.
  • Wavefronts from the audio signals and the associated data for the individual transducers contained within the respective assembly wherein the geometric position of a reference point within the coordinate system for the model-based approach of wave field synthesis for each individual assembly by their placement in the arrangement of Schaliwandmod and the Edge length of the individual modules is determined and the position of each transducer in this
  • Coordinate system is defined by its arrangement to this reference point of the assembly, so that solely from the arrangement of the assemblies in the arrangement
  • Sound transducers can determine the position of each individual transducer in the coordinate system from the vector addition to the respective higher reference point.
  • the assemblies are enclosed by a module housing or are formed of equal size segments in a structure of components.
  • the arrangement of transducers is freely scalable in size because the computing power in the central unit does not increase with the number of transducers in the system.
  • all the audio signals and the data for the synthesis of the wavefronts are fed to all assemblies of the device, wherein in each assembly, the data are processed, resulting from the position of the respective assembly within the array of sound transducers.
  • the position of the individual transducers within an assembly is stored relative to a fixed reference point of the assembly in the assembly.
  • the position of a fixed reference point of each module is determined to the position of a reference point of the device from sound transducers by informing the module at which position it is installed within the device of sound transducers and they are stored therefrom with the aid of Dimensions of the individual modules, which can also be designed as a module, the position of their reference point to the central reference point of the device
  • the modules are different density with
  • the assemblies can be constructed in a closed plane, closed row.
  • the assemblies can also be constructed so that they are not arranged in a closed plane or closed row.
  • the sound transducers are associated with sub-surfaces, which can form a body that can radiate the wavefronts in a common system in different directions.
  • a system for image reproduction is applied to the same carrier system that carries the sound transducer.
  • the modules or modules are combined in pre-assembled units. This allows a faster setup of the system.
  • a decentralized device constructed from acoustic transducers according to the principle of wave field synthesis on multiple modules, each having a plurality of sound transducers and an assembly control,
  • each module controller is arranged to generate drive signals for the sound transducers of its assembly of audio signals and associated data for the form for the synthesis of the wavefronts.
  • This structure also enables a system for image reproduction to be applied to a support system carrying the sound transducers.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

L'invention concerne un système de transducteurs électroacoustiques à synthèse de front d'ondes, qui peut être assemblé en une structure décentralisée à dimension totale librement modulable. La structure décentralisée du système garantit la libre modularité. La complexité de calcul dans le système central reste indépendante du nombre de transducteurs électroacoustiques dans le système global. Dans les systèmes connus jusqu'à présent permettant la reconstruction d'un champ sonore par la synthèse de front d'ondes, davantage d'exigences sont imposées au système central à mesure que le nombre de transducteurs électroacoustiques alimentés par celui-ci augmente. C'est également pour cela que la synthèse de front d'ondes est le plus souvent réduite au plan horizontal de l'auditeur, la troisième dimension se perdant dans la reproduction des événements acoustiques. Grâce à la solution proposée par l'invention, il est possible, dans l'approche à base de modèle de la synthèse de front d'ondes, d'installer des systèmes 2D de transducteurs électroacoustiques à synthèse de front d'ondes de taille quelconque, pouvant réaliser des changements de lieu rapides des sources sonores virtuelles avec les effets Doppler associés et sans artéfacts. Ainsi, la puissance de calcul nécessaire peut être répartie de façon décentralisée, du fait que la quantité de données à transmettre entre les sous-systèmes reste comparativement faible.
EP14781270.5A 2013-08-10 2014-09-12 Système de synthèse de champ d'ondes Active EP3061271B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14781270T PL3061271T3 (pl) 2013-08-10 2014-09-12 Układ syntezy pola falowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013013377.7A DE102013013377A1 (de) 2013-08-10 2013-08-10 Dezentraler Aufbau eines Wellenfeldsynthese Systems
PCT/IB2014/001806 WO2015036845A1 (fr) 2013-08-10 2014-09-12 Système à synthèse de front d'ondes

Publications (2)

Publication Number Publication Date
EP3061271A1 true EP3061271A1 (fr) 2016-08-31
EP3061271B1 EP3061271B1 (fr) 2018-04-04

Family

ID=51662155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14781270.5A Active EP3061271B1 (fr) 2013-08-10 2014-09-12 Système de synthèse de champ d'ondes

Country Status (7)

Country Link
US (1) US9716961B2 (fr)
EP (1) EP3061271B1 (fr)
DE (2) DE102013013377A1 (fr)
ES (1) ES2674771T3 (fr)
PL (1) PL3061271T3 (fr)
TR (1) TR201808776T4 (fr)
WO (1) WO2015036845A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11089403B1 (en) 2018-08-31 2021-08-10 Dream Incorporated Directivity control system
CN111322978B (zh) * 2019-11-08 2021-02-02 北京航空航天大学 一种非理想平面装配偏差的计算方法
DE102020203659A1 (de) 2020-03-20 2021-09-23 Holoplot Gmbh Schallwandler-Anordnung und Verfahren zum Betrieb einer Schallwandler-Anordnung
IT202000009928A1 (it) 2020-05-05 2021-11-05 Powersoft S P A Apparato per l’amplificazione acustica
DE102021207302A1 (de) 2021-07-09 2023-01-12 Holoplot Gmbh Verfahren und Vorrichtung zur Beschallung mindestens eines Publikumsbereiches
CN113965842A (zh) * 2021-12-01 2022-01-21 费迪曼逊多媒体科技（上海）有限公司 一种基于wfs波场合成技术的可变声学家庭影院音响系统
DE102022129642A1 (de) 2022-11-09 2024-05-16 Holoplot Gmbh Verfahren zur richtungsabhängigen Korrektur des Frequenzganges von Schallwellenfronten

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL102370A (en) 1992-06-30 1995-03-30 Yissum Res Dev Co Process for modifying particulate solids and particulate solids prepared thereby
NL9401860A (nl) * 1994-11-08 1996-06-03 Duran Bv Luidsprekersysteem met bestuurde richtinggevoeligheid.
DE10319708A1 (de) 2003-05-02 2004-11-25 Tu Bergakademie Freiberg Alkalihaltige Gläser mit modifizierten Glasoberflächen und Verfahren zu ihrer Herstellung
DE102004002532A1 (de) 2004-01-17 2005-09-22 Helmut Oellers Frontalmatrix-Wellenfeldsynthese (FMWFS)
DE102005008366A1 (de) * 2005-02-23 2006-08-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Ansteuern einer Wellenfeldsynthese-Renderer-Einrichtung mit Audioobjekten
DE102009010278B4 (de) * 2009-02-16 2018-12-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Lautsprecher
KR101490725B1 (ko) * 2010-03-23 2015-02-06 돌비 레버러토리즈 라이쎈싱 코오포레이션 비디오 디스플레이 장치, 오디오-비디오 시스템, 음향 재생을 위한 방법 및 로컬라이즈된 지각적 오디오를 위한 음향 재생 시스템

Also Published As

Publication number Publication date
WO2015036845A1 (fr) 2015-03-19
PL3061271T3 (pl) 2018-10-31
ES2674771T3 (es) 2018-07-03
EP3061271B1 (fr) 2018-04-04
DE102013013377A1 (de) 2015-02-12
DE112014003702A5 (de) 2016-04-28
TR201808776T4 (tr) 2018-07-23
US9716961B2 (en) 2017-07-25
US20160192103A1 (en) 2016-06-30

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