WO2008012308A2 - Ensemble constitué d'un générateur acoustique et utilisation dudit ensemble - Google Patents

Ensemble constitué d'un générateur acoustique et utilisation dudit ensemble Download PDF

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Publication number
WO2008012308A2
WO2008012308A2 PCT/EP2007/057619 EP2007057619W WO2008012308A2 WO 2008012308 A2 WO2008012308 A2 WO 2008012308A2 EP 2007057619 W EP2007057619 W EP 2007057619W WO 2008012308 A2 WO2008012308 A2 WO 2008012308A2
Authority
WO
WIPO (PCT)
Prior art keywords
unit
arrangement according
exciter
sound
window
Prior art date
Application number
PCT/EP2007/057619
Other languages
German (de)
English (en)
Other versions
WO2008012308A3 (fr
Inventor
Harry Bachmann
Sigmund Eggenberger
Thomas ZURBRÜGG
Original Assignee
Anocsys Ag
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 Anocsys Ag filed Critical Anocsys Ag
Publication of WO2008012308A2 publication Critical patent/WO2008012308A2/fr
Publication of WO2008012308A3 publication Critical patent/WO2008012308A3/fr

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
    • H04R3/00—Circuits for transducers, loudspeakers or 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
    • 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
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
    • 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
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
    • 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

Definitions

  • the present invention relates to an arrangement according to the preamble of claim 1 and uses of the arrangement in an active noise reduction system.
  • ANC Active Noise Canceling
  • Transducers such as speakers produced.
  • the signal radiated by the electro-acoustic transducers is calculated by means of a suitable algorithm and continuously corrected.
  • the basis for the calculation of the signal to be radiated by the electro-acoustic transducers is the information supplied by one or more sensors. These are on the one hand information about the nature of the signal to be minimized. For this purpose, for example, a microphone can be used which detects the noise to be minimized. To the others, however, also need information about the remaining residual signal. Again, microphones can be used.
  • a system for active noise reduction requires information from at least one sensor (for example a microphone), which determines the residual error.
  • additional sensors are provided that provide information about the nature of the signal to be minimized.
  • an active noise reduction system requires one or more actuators to output the correction signal.
  • Actuators often speaker in various designs and installation variants for use.
  • the aim is to obtain the most balanced frequency response possible, ie the lowest possible transfer function from the electrical signal to the acoustic signal at some distance from the loudspeaker.
  • the maximum achievable power is an important parameter, on the one hand between the input power (maximum usable electric drive of the speaker) and the effectively radiated acoustic Signal power must be distinguished.
  • Conventional speakers have an efficiency of only a few percent.
  • DML or Distributed Mode Loudspeaker is a class of sound transducers in which a flat panel is vibrated to stimulate as many of its eigenmodes as possible.
  • a DML panel consists of a thin, flat plate, which ideally has a high rigidity.
  • the excitation takes place via elements based on voice coil, which stimulate the entire internal structure of the panel to bending vibrations, which causes a spatially and temporally evenly distributed radiation behavior.
  • Membrane resonances as they occur in conventional speakers, are not visible, and the ripple of the frequency response remain low due to the dispersivity of the bending waves. Due to the small deflections of the panel, the restoring forces of the panel material always remain in the linear range, and the distortion values of a DML panel are therefore lower than those of a cone speaker.
  • DML panel decreases the sound pressure with increasing distance to a lesser extent than in a conventional loudspeaker, whereby a uniform sound distribution in the room is achieved.
  • the effectiveness and efficiency of an ANC system in a room now depends, among other factors, such as processing speed, also substantially on the acoustic properties of the actuators (for example, speakers).
  • a spatially evenly distributed radiation behavior and the most uniform possible distribution of sound in a room to be calmed are desirable.
  • acoustic distortions are to be kept low.
  • the ripple of the frequency response should be as small as possible.
  • the present invention is therefore based on the object to provide an arrangement with a sound generating unit, which has at least part of the advantages of a DML panel.
  • the invention relates first of all to an arrangement having a sound generation unit, which comprises a fixing unit and an excitation unit, wherein the fixing unit is operatively connected to the exciter unit.
  • the fixing unit is rigidly connected to a glass pane of a window.
  • An embodiment of the present invention is that the sound generating unit comprises an electromagnetic transducer.
  • the sound generation unit comprises a piezoceramic unit.
  • the sound generating unit comprises: a housing pot
  • An exciter unit in particular a voice coil, wherein the suspension is operatively connected on the one hand with the fixing unit and on the other hand with the means for generating the magnetic field.
  • FIG. 1 Further embodiments of the present invention are that the housing pot by means of a flexible suspension is connected via the fixing unit with the glass pane.
  • Invention are that the glass pane of a window is used for sound radiation.
  • an inventive use of the arrangement according to the above embodiments in an active noise reduction system is given, which is used to calm a room.
  • the excitation unit is arranged on the inside of the glass of a window.
  • FIG. 1 is a plan view of a room with a known active noise reduction system in a schematic
  • Fig. 2 is a plan view of a room with an inventive arrangement of a
  • Fig. 3 is an elevational view of an inventive arrangement of a sound generating unit in a schematic
  • FIG. 1 shows a room 2 in plan with an active noise reduction system consisting of a processing unit 20, a sensor unit 21 (for example a microphone), an actuator unit 24 (for example a loudspeaker), an amplifier unit 16 and an outdoor sensor unit 22 (for example a microphone) , While the sensor unit 21 and the outdoor sensor unit 22 are individually connected to the processing unit 20, the actuator unit 24 is connected to the processing unit 20 via the amplifier unit 16.
  • the sensor unit 21 is provided for receiving residual noise, which are present in the space 2.
  • the correction signal which is used to correct the residual noise or to partially correct the residual noise in the space 2, is generated by the actuator unit 24.
  • the correction signal is determined at least partially with the help of recorded with the outdoor sensor unit 22 disturbing external noise. For this is the
  • Outside sensor unit 22 positioned in a region 1, which is outside the room to be calmed 2, arranged. As can be seen from FIG. 1, for this purpose the space 2 is separated from the area 1 by the wall 23. The signal recorded with the outdoor sensor unit 222 is supplied to the processing unit 20 for further processing.
  • FIG. 2 again shows the floor plan of the room 2, as already shown in Fig. 1.
  • a sonic exciter unit 11 is provided instead of the actuator unit 24 (FIG
  • Amplifier unit 16 is connected to the processing unit 20. According to the invention, the sonic exciter unit 11 is fastened on the glass pane 3 of a window on the inside of the glass pane by means of a fixing unit 9.
  • a further embodiment of the present invention is that the sound exciter unit 11 on the outside, i. in the area 1, is arranged.
  • Fig. 3 shows a section perpendicular to the bottom 14 of the space 2 in the region of a window.
  • the wall 23 ( Figures 1 and 2) is realized by a masonry 5, in which the window, consisting of a glass pane 3 and a window frame 4, 4 ', is installed.
  • the Schallerregeriens 11 is mounted on the inside of the glass pane 3.
  • the Schallerregeriens 11 consists of a housing pot 8, a suspension 10, a permanent magnet 7, a voice coil 6 and a
  • Fixation unit 9 An electrical signal is applied to the voice coil 6, whereby a magnetic field is created, which in turn interacts with a magnetic field of the permanent magnet 7. As a result, the housing pot 8 is moved relative to the glass sheet 3, in response to the elasticity of the suspension 10.
  • the suspension 10 connects the two rigid parts, which consists on the one hand of the housing pot 8 and the permanent magnet 7 and on the other hand from the voice coil 6, on the fixing unit 9 is rigidly connected to the glass pane 5.
  • an electrical signal supplied to the sonic exciter unit 11 which corresponds to a desired acoustic signal or is approximately similar, is transmitted to the glass pane 3 via the voice coil 6.
  • the sound emission takes place with highly diffuse properties through the glass pane 3, preferably in the direction 17 towards the interior of the room 2 and in the direction 18 towards the outside area 1.
  • Another embodiment of the present invention is that both the voice coil 6 and the permanent magnet 7 are fixedly connected to the glass pane 5.
  • the suspension 10 is rigid, ie the suspension 10 is not elastic but stiff.
  • this Schallerregeriens 11 is constructed on the bending principle.
  • a still further embodiment of the present invention is that the Schallerregeriens 11 is also mounted on the outside of the glass pane 3.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Motor Or Generator Frames (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne un ensemble constitué d'un générateur acoustique (11) comportant une unité de fixation (9) et une unité d'excitation (6), l'unité de fixation (9) étant en liaison fonctionnelle avec l'unité d'excitation (6). Selon l'invention, l'unité de fixation (9) est reliée de manière rigide à une vitre (3) d'une fenêtre. L'invention concerne également des utilisations de l'ensemble dans un système de d'annulation active du bruit.
PCT/EP2007/057619 2006-07-25 2007-07-24 Ensemble constitué d'un générateur acoustique et utilisation dudit ensemble WO2008012308A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH12002006 2006-07-25
CH1200/06 2006-07-25

Publications (2)

Publication Number Publication Date
WO2008012308A2 true WO2008012308A2 (fr) 2008-01-31
WO2008012308A3 WO2008012308A3 (fr) 2008-05-22

Family

ID=38896037

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/057619 WO2008012308A2 (fr) 2006-07-25 2007-07-24 Ensemble constitué d'un générateur acoustique et utilisation dudit ensemble

Country Status (1)

Country Link
WO (1) WO2008012308A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104578895A (zh) * 2014-12-26 2015-04-29 黑龙江大学 窗用阻尼式抗噪声闭环控制装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352039A (en) * 1980-07-25 1982-09-28 The United States Of America As Represented By The Secretary Of The Army Sonic transducer
DE3205312A1 (de) * 1982-02-15 1983-08-25 Günter 8130 Starnberg Hehemann Elektronisches schallschutzsystemfenster
EP0964387A2 (fr) * 1998-06-13 1999-12-15 DaimlerChrysler AG Procédé et dispositif pour modifier la bruit générée par une vitre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352039A (en) * 1980-07-25 1982-09-28 The United States Of America As Represented By The Secretary Of The Army Sonic transducer
DE3205312A1 (de) * 1982-02-15 1983-08-25 Günter 8130 Starnberg Hehemann Elektronisches schallschutzsystemfenster
EP0964387A2 (fr) * 1998-06-13 1999-12-15 DaimlerChrysler AG Procédé et dispositif pour modifier la bruit générée par une vitre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHU ET AL: "Active noise control using a distributed mode flat panel loudspeaker" ISA TRANSACTIONS, INSTRUMENT SOCIETY OF AMERICA. PITTSBURGH, US, Bd. 42, Nr. 3, Juli 2003 (2003-07), Seiten 475-484, XP005835310 ISSN: 0019-0578 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104578895A (zh) * 2014-12-26 2015-04-29 黑龙江大学 窗用阻尼式抗噪声闭环控制装置

Also Published As

Publication number Publication date
WO2008012308A3 (fr) 2008-05-22

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