EP1329876A2 - Résonateur amortisseur de son dans un tube conducteur de son - Google Patents

Résonateur amortisseur de son dans un tube conducteur de son Download PDF

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Publication number
EP1329876A2
EP1329876A2 EP02027899A EP02027899A EP1329876A2 EP 1329876 A2 EP1329876 A2 EP 1329876A2 EP 02027899 A EP02027899 A EP 02027899A EP 02027899 A EP02027899 A EP 02027899A EP 1329876 A2 EP1329876 A2 EP 1329876A2
Authority
EP
European Patent Office
Prior art keywords
sound
resonator
pipe
resonator according
pipe duct
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.)
Withdrawn
Application number
EP02027899A
Other languages
German (de)
English (en)
Other versions
EP1329876A3 (fr
Inventor
Andreas Graefenstein
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.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
Filterwerk Mann and Hummel 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 Mann and Hummel GmbH, Filterwerk Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP1329876A2 publication Critical patent/EP1329876A2/fr
Publication of EP1329876A3 publication Critical patent/EP1329876A3/fr
Withdrawn legal-status Critical Current

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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
    • G10K11/1787—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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1082—Microphones, e.g. systems using "virtual" 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
    • G10K2210/112—Ducts
    • 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
    • G10K2210/3227—Resonators

Definitions

  • the invention relates to a resonator for sound attenuation in a sound-conducting pipe duct in the preamble of the claim 1 specified genus.
  • WO 93/25999 describes an active resonator for damping the Sound development in an exhaust pipe of an internal combustion engine known.
  • the known resonator has a loudspeaker as an actively controllable sound generator that is used for generation from an anti-phase noise to superposition the pipe duct sound is arranged in a resonator chamber, which is formed within a resonance body.
  • the pipe wall of the sound-conducting pipe duct is a socket trained to which the can-shaped resonance body connected and which is a sound-permeable opening forms between the resonator chamber and the pipe duct.
  • the speaker is controlled by a control unit for generation a sound signal, which is due to modification in the resonator room as noise with the sound to be damped superimposed in phase in the pipe duct, thereby reducing noise causes.
  • the control unit draws a measurement signal of a sound sensor in the pipe duct, with control of the noise, a feedback signal with information about the remaining sound level after damping is used.
  • a controlled acoustic Waveguide known for sound absorption, in which an elongated Hollow chamber as a resonator room via a sound-transmitting Opening connected to the sound-conducting pipe duct is.
  • the longitudinal resonances of the resonator room are active by means of of a sounder that can be influenced at the opening to the sound-conducting pipe duct opposite end of the Resonator space is arranged.
  • a sensor in the pipe duct to detect the Sound spectrum arranged in the pipe duct and a microphone provided immediately in front of the diaphragm of the sounder detects the membrane vibrations of the sounder.
  • the microphone signal should be inverted with an amplifier and dependent of the sound signal from the sensor in the pipe duct the speaker can be fed back.
  • the known active resonance resonators require a large one Installation space volume that is not available everywhere, for Example in automotive engineering. particularly for Attenuation of low frequencies below 100 Hz is required often larger volumes of the known devices Sound box and large geometric dimensions depending on the damping to be achieved. If only a small installation space is available for devices for sound level attenuation, is the use of known resonators with large dimensions often excluded or their use limited possible.
  • the present invention is based on the object To create a resonator of the generic type with which at low Space of the resonator a strong active suppression of the sound level is possible.
  • the cross section of the sound permeable Opening in the tube wall in a substantially vertical provided ring shape lying to a longitudinal axis of the pipe duct whereby those actively excited by the sound generator in the resonator room acoustic waves of noise across the entire Penetrate the circumference of the pipe duct and thus with a compact design of the resonator efficiently the one-dimensional sound wave propagation can dampen in the pipe duct.
  • the resonance room through several pipe connections or arranged in a ring Bores connected to the pipe channel.
  • the sound-permeable opening is advantageous as a circumferential one Annular gap formed in the tube wall, which directly on the sound modes in the pipe duct works and a low impedance exhibit. Low-frequency modes can also be used be dampened.
  • the annular gap allows a symmetrical effect of noise, the acoustic wave in the pipe duct can be influenced or wiped out more efficiently.
  • the Dimensioning the width of the annular gap in the pipe wall and the annular gap area depends on the respective use of the resonator according to the invention, namely from that to be damped Sound spectrum. This is, for example, when used in the intake line the noise development of an internal combustion engine and thus the Dimensioning of the gap width and the annular gap area (Volume stroke) in particular also from the cylinder stroke of the internal combustion engine specified.
  • the generated in the resonator room Disturbing sound waves through the annular gap in an acoustically special effective way to create interference effects in the pipe channel.
  • Fig. 1 shows a resonator 1, the tube wall 3 in essentially symmetrical to a longitudinal axis 11 is.
  • the pipe duct is connected to a gas-carrying pipe system such as an intake port of an internal combustion engine or it can also be part of the intake line.
  • the Pipe channel 2 therefore carries sound from the internal combustion engine is generated and in the pipe channel 2 in the direction of the arrow 26 spreads.
  • the resonator 1 for damping the Noise in the pipe duct 2 actively points from a control unit 9 controllable acoustic sounder 4, which is a disturbing sound to overlay the pipe duct noise.
  • the optimal measuring position of the microphone would be given if this is centered on the longitudinal axis 11 of the pipe duct 2 would lie.
  • the microphone could be in the Pipe wall held, inserted into the center of the pipe channel Be tube, the opening for measuring the static Sound pressure in the fluidic dead area of the Microphone body is beyond the flow direction 26.
  • the acoustic sound generator 4 is arranged in a resonator room 12, the noise signal emitted by the sounder 4 same frequency and inverse phase to the sound in Passes pipe channel 2 through an opening 7 in the pipe channel 2.
  • the opening 7 is designed according to the invention as an annular gap 7, the at least approximately perpendicular to the longitudinal axis 11 formed in the tube wall 3 and of at least one also perpendicular to the longitudinal axis of the tube wall Wall 21 is limited.
  • the annular gap 7 can be part of the Be resonator room 12, wherein the acoustic sound generator 4th is arranged perpendicular to the longitudinal axis 11 of the pipe channel 2 and so the noise directly through the resonator chamber 12 and the annular gap 7 for damping action on the one-dimensional emits sound waves propagating in the pipe channel 2.
  • Fig. 2 shows a schematic representation of the electronics of the Control unit 9.
  • the measurement signal 14 of the microphone 8 in the pipe duct 2 (Fig. 1) is on an inverted power amplifier 15 switched and thus drives with an amplified signal 14 ' with the same frequency as the measurement signal 14 of the microphone 8, however opposite phase length the acoustic sounder 4 directly. It can be useful for efficient damping be suitable band filters or delay stages in to integrate the amplifier 15.
  • FIG. 3 shows a resonator 1 in which the resonator chamber 12 ring-shaped in a resonator housing encompassing the pipe channel 2 13 is formed.
  • the resonator housing 13 is there formed by overlapping wall sections 22a and 22b, each of the end sections of two section components 3a, 3b the pipe wall of the pipe channel 2 are.
  • the resonator room 12 is in the axial direction of the pipe channel 2 by radial Wall parts of the respective section components 3a, 3b limited.
  • the external Wall section of the two overlapping wall sections 22a, 22b is longer than the inner one Wall section 22a, so that an annular gap 7 over the entire circumference of the pipe wall of the pipe channel 2 remains.
  • the sound generator arranged in the resonator chamber 12 is in the exemplary embodiment 3 shows an electrically operated ring coil 5, to which that of the control unit shown in Fig. 2 9 generated inverted frequency signal 14 'for generating the Noise 16 is switched.
  • a magnetized ferrite tube 17 is in the tube channel 2 provided which is in the axial direction with respect to the longitudinal axis 11 of the pipe channel 2 into the magnetic field of the ring coil 5 dips.
  • the ferrite tube 17 carries an annular disc 18 or Membrane which is the part of the resonator space which receives the coil 5 12 limited essentially airtight.
  • the washer 18 follows the ferrite tube 17 in the magnetic field of the coil 5, the magnetic field being determined by the control signal 14 '. In this way, the sound pressure in the resonator chamber 12 implemented by the annular gap 7 in the pipe wall in noise is generated.
  • the ferrite tube is essentially frictionless on the outer surface of the section component 3a of the pipe channel 2 stored, for example as in the embodiment shown by means of ball bearings 23.
  • Fig. 4 shows a variant of the resonator 1, which is similar how that is constructed according to FIG. 3.
  • a mirror-symmetrically arranged second actuator in the form of a provided further coil 5 ', with the same magnetic field direction out of phase or with an opposite magnetic field is operated in phase.
  • FIG. 5 shows a further embodiment of the invention Resonators, in which the control signal 14 'with a statement about Frequency and phase position of the noise 16 to be generated by a piezoelectric vibrating element 6 in the resonator space 12 is converted into noise 16.
  • the resonator room 12 is concentric to the longitudinal axis 11 of the pipe channel as a ring cylinder 2 trained.
  • Limit with regard to one compact design of the resonator 1 two adjacent section components 3a, 3b of the tube wall of the tube channel 2 inner side of the resonator housing 13, while the radially outer side of the resonator housing 13 from a the tube wall parts 3a, 3b axially holding together the housing part is formed.
  • the annular gap 7 is in this embodiment on the side adjacent to the vibration element 6 from a rounded end of the pipe section 3a and on the opposite side bounded by a radial wall 21.
  • the sounder shown as a piezo oscillator 6 may have a higher circuit complexity Generation of the noise 16 with the frequency of the sound in Pipe channel 2 may be required and an increased supply voltage compared to the versions with acoustic sounder or 3, however, due to the high Resonance frequencies of piezo oscillators a particularly good one Attenuation result achieved at high frequencies from approx. 4 KHz become.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
EP02027899A 2002-01-17 2002-12-13 Résonateur amortisseur de son dans un tube conducteur de son Withdrawn EP1329876A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10201494 2002-01-17
DE10201494A DE10201494A1 (de) 2002-01-17 2002-01-17 Resonator

Publications (2)

Publication Number Publication Date
EP1329876A2 true EP1329876A2 (fr) 2003-07-23
EP1329876A3 EP1329876A3 (fr) 2009-04-01

Family

ID=7712297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02027899A Withdrawn EP1329876A3 (fr) 2002-01-17 2002-12-13 Résonateur amortisseur de son dans un tube conducteur de son

Country Status (3)

Country Link
US (1) US20030152239A1 (fr)
EP (1) EP1329876A3 (fr)
DE (1) DE10201494A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2462347A1 (fr) * 2009-08-03 2012-06-13 Koninklijke Philips Electronics N.V. Résonateur à faible restriction doté de caractéristiques de fréquence réglables et destiné à être utilisé dans des systèmes de nébuliseur à compresseur

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050201567A1 (en) * 2004-03-12 2005-09-15 Browne Alan L. Tunable exhaust system
AT414307B (de) * 2004-06-08 2006-12-15 Reineke Horst Vorrichtung zur geräuschreduktion
US8069910B2 (en) * 2005-10-12 2011-12-06 Nuventix, Inc. Acoustic resonator for synthetic jet generation for thermal management
JP2008213547A (ja) * 2007-02-28 2008-09-18 Nissan Motor Co Ltd 騒音制御装置
US8165311B2 (en) * 2009-04-06 2012-04-24 International Business Machines Corporation Airflow optimization and noise reduction in computer systems
ES2405729R1 (es) * 2010-11-30 2013-06-19 Univ Catalunya Politecnica Sistema para modificar la sonoridad de motor endotérmico
WO2014126548A1 (fr) * 2013-02-12 2014-08-21 Faurecia Emissions Control Technologies Système d'échappement de véhicule avec amortissement de la résonance
US9736574B2 (en) * 2014-07-18 2017-08-15 Bose Corporation Acoustic device
RU2604174C1 (ru) * 2015-10-19 2016-12-10 федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" Система гашения спектра акустических шумов
JP6748507B2 (ja) * 2016-07-29 2020-09-02 キヤノン株式会社 情報処理装置及び情報処理装置の製造方法
US10699693B1 (en) * 2019-07-08 2020-06-30 Hyundai Motor Company Sound generator for vehicle
CN112987508B (zh) * 2021-03-04 2022-09-30 长鑫存储技术有限公司 振动衰减结构及曝光装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993025999A1 (fr) 1992-06-08 1993-12-23 Ford Motor Company Limited Agencement de transducteurs pour systeme de suppression active de bruit
US5457749A (en) * 1990-04-09 1995-10-10 Noise Cancellation Technologies, Inc. Electronic muffler
DE19861018C2 (de) 1998-12-15 2001-06-13 Fraunhofer Ges Forschung Gesteuerter akustischer Wellenleiter zur Schalldämpfung

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US4665549A (en) * 1985-12-18 1987-05-12 Nelson Industries Inc. Hybrid active silencer
US5097923A (en) * 1988-02-19 1992-03-24 Noise Cancellation Technologies, Inc. Active sound attenation system for engine exhaust systems and the like
JPH01245795A (ja) * 1988-03-28 1989-09-29 Daikin Ind Ltd 電子消音装置
US5446790A (en) * 1989-11-24 1995-08-29 Nippondenso Co., Ltd. Intake sound control apparatus
US5619020A (en) * 1991-08-29 1997-04-08 Noise Cancellation Technologies, Inc. Muffler
US5347585A (en) * 1991-09-10 1994-09-13 Calsonic Corporation Sound attenuating system
US6940983B2 (en) * 2000-05-19 2005-09-06 Siemens Vdo Automotive Inc. Resonator for active noise attenuation system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457749A (en) * 1990-04-09 1995-10-10 Noise Cancellation Technologies, Inc. Electronic muffler
WO1993025999A1 (fr) 1992-06-08 1993-12-23 Ford Motor Company Limited Agencement de transducteurs pour systeme de suppression active de bruit
DE19861018C2 (de) 1998-12-15 2001-06-13 Fraunhofer Ges Forschung Gesteuerter akustischer Wellenleiter zur Schalldämpfung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2462347A1 (fr) * 2009-08-03 2012-06-13 Koninklijke Philips Electronics N.V. Résonateur à faible restriction doté de caractéristiques de fréquence réglables et destiné à être utilisé dans des systèmes de nébuliseur à compresseur

Also Published As

Publication number Publication date
DE10201494A1 (de) 2003-07-31
EP1329876A3 (fr) 2009-04-01
US20030152239A1 (en) 2003-08-14

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